How To Find Irr On Ti 84 Plus?
How to Find the Irr on a TI84 Plus
The TI84 Plus is a popular graphing calculator that is used by students in high school and college. It has a variety of features, including the ability to find the irrational root (IRR) of a function. This can be useful for solving problems in algebra, calculus, and other math courses.
In this article, we will show you how to find the IRR on a TI84 Plus. We will start by explaining what the IRR is and why it is important. Then, we will walk you through the steps of finding the IRR using the calculator.
By the end of this article, you will be able to find the IRR of any function on your TI84 Plus. So let’s get started!
Step  Instructions  Example 

1  Press 2nd Y=  
2  Press 2 to select CALC  
3  Press 3 to select IRR  
4  Enter the values of N, I, and P. The N value is the number of periods, the I value is the interest rate, and the P value is the present value.  
5  Press ENTER to calculate the IRR. 
What is the IRR function?
The internal rate of return (IRR) is a financial metric that measures the profitability of an investment. It is calculated as the discount rate that makes the net present value (NPV) of an investment equal to zero. In other words, the IRR is the rate of return that an investment must earn in order to break even.
The IRR is a useful tool for comparing different investments and making investment decisions. It can also be used to evaluate the performance of an existing investment.
The IRR is calculated using the following formula:
IRR = [NPV(r) = 0]
where:
 NPV is the net present value of the investment
 r is the discount rate
The IRR can be calculated using a financial calculator or spreadsheet software.
How to find the IRR on the TI84 Plus?
The TI84 Plus can be used to calculate the IRR of an investment using the following steps:
1. Enter the cash flows of the investment into the calculator.
2. Press the [2nd] key and then the [QUIT] key to enter the finance mode.
3. Press the [2nd] key and then the [IRR] key to select the IRR function.
4. Enter the number of periods of the investment.
5. Press the [ENTER] key to calculate the IRR.
The IRR will be displayed on the screen.
Here is an example of how to find the IRR of an investment using the TI84 Plus.
Suppose you are considering investing in a project that will cost $10,000 and will generate $5,000 in cash flows each year for the next three years. The IRR of this investment can be calculated using the following steps:
1. Enter the cash flows of the investment into the calculator.
0 10000
1 5000
2 5000
3 5000
2. Press the [2nd] key and then the [QUIT] key to enter the finance mode.
3. Press the [2nd] key and then the [IRR] key to select the IRR function.
4. Enter the number of periods of the investment.
3
5. Press the [ENTER] key to calculate the IRR.
The IRR will be displayed on the screen.
15.87%
In this example, the IRR of the investment is 15.87%. This means that the investment will earn a return of 15.87% per year, on average.
The IRR is a useful tool for evaluating investment opportunities. It can help you to compare different investments and make informed investment decisions.
How to Find IRR on TI 84 Plus?
The internal rate of return (IRR) is a financial metric that measures the profitability of an investment. It is calculated as the discount rate that makes the net present value (NPV) of an investment equal to zero. The IRR can be used to compare different investments and to determine which one is the most profitable.
The TI 84 Plus graphing calculator can be used to calculate the IRR of an investment. To do this, you will need to enter the following information into the calculator:
 The initial investment amount
 The annual cash flows
 The number of years of the investment
Once you have entered this information, you can use the following steps to calculate the IRR:
1. Press the “2nd” key and then the “QUIT” key to clear the calculator.
2. Press the “Y=/X” key.
3. Enter the initial investment amount in the “Y” value.
4. Press the “ENTER” key.
5. Enter the annual cash flows in the “X” values.
6. Press the “ENTER” key.
7. Enter the number of years of the investment in the “N” value.
8. Press the “ENTER” key.
9. The IRR will be displayed in the “Y” value.
Here is an example of how to use the TI 84 Plus to calculate the IRR of an investment. Suppose you are considering investing $10,000 in a project that is expected to generate annual cash flows of $2,000 for the next five years. The IRR of this investment can be calculated using the following steps:
1. Press the “2nd” key and then the “QUIT” key to clear the calculator.
2. Press the “Y=/X” key.
3. Enter 10000 in the “Y” value.
4. Press the “ENTER” key.
5. Enter 2000 in the “X” values.
6. Press the “ENTER” key.
7. Enter 5 in the “N” value.
8. Press the “ENTER” key.
9. The IRR will be displayed in the “Y” value.
In this example, the IRR of the investment is 10.5%. This means that the investment is expected to generate a return of 10.5% per year.
Examples of Using the IRR Function
The IRR function can be used to evaluate a variety of different investments. Here are a few examples of how the IRR function can be used:
 Evaluating a new business venture: The IRR can be used to evaluate the profitability of a new business venture. By calculating the IRR of the venture, you can determine how long it will take for the venture to break even.
 Evaluating a real estate investment: The IRR can be used to evaluate the profitability of a real estate investment. By calculating the IRR of the investment, you can determine how much money you can expect to make on the investment.
 Evaluating a stock investment: The IRR can be used to evaluate the profitability of a stock investment. By calculating the IRR of the investment, you can determine how much money you can expect to make on the investment.
The IRR function is a powerful tool that can be used to evaluate a variety of different investments. By calculating the IRR of an investment, you can make more informed decisions about whether or not to invest in the investment.
Limitations of the IRR Function
The IRR function is a useful tool for evaluating investments, but it does have some limitations. Here are a few of the limitations of the IRR function:
 The IRR does not take into account the time value of money. The IRR assumes that all cash flows are received at the end of the year. This can be misleading if some of the cash flows are received earlier in the year.
 The IRR does not take into account risk. The IRR does not consider the risk of an investment. This can be important if you are comparing two investments with different levels of risk.
 The IRR can be misleading in cases of multiple IRRs. In some cases, an investment can have multiple IRRs. This can make it difficult to determine the true profitability of the investment.
Despite these limitations, the IRR function can still be a useful tool for evaluating investments. However, it is important to be aware of the limitations of the IRR function before using it to make investment decisions.
How do I find the irrational root of a function on the TI84 Plus?
1. Press the Y= key to enter the Y= editor.
2. Enter the function you want to find the irrational root of.
3. Press the WINDOW key to open the window settings.
4. Set the Xmin and Xmax values so that they bracket the irrational root you are looking for.
5. Press the GRAPH key to graph the function.
6. Use the TRACE button to find the approximate location of the irrational root.
7. Press the 2ND key and then the CALC key to open the calculate menu.
8. Select 5: Root and press ENTER.
9. Enter the X value of the approximate location of the irrational root and press ENTER.
10. The calculator will display the irrational root of the function.
What is the difference between the real and imaginary roots of a function?
The real roots of a function are the values of x that make the function equal to zero. The imaginary roots of a function are the values of x that make the function equal to an imaginary number.
**How do I find the imaginary roots of a function on the TI84 Plus?
1. Press the Y= key to enter the Y= editor.
2. Enter the function you want to find the imaginary roots of.
3. Press the WINDOW key to open the window settings.
4. Set the Xmin and Xmax values so that they bracket the imaginary roots you are looking for.
5. Press the GRAPH key to graph the function.
6. Use the TRACE button to find the approximate location of the imaginary roots.
7. Press the 2ND key and then the CALC key to open the calculate menu.
8. Select 6: Imaginary and press ENTER.
9. Enter the X value of the approximate location of the imaginary root and press ENTER.
10. The calculator will display the imaginary root of the function.
**Can I find the irrational roots of a function that is not graphable on the TI84 Plus?
No, the TI84 Plus can only find the irrational roots of functions that are graphable on the calculator. If the function you are trying to find the irrational roots of is not graphable on the calculator, you will need to use a different method, such as a computer algebra system.
In this article, we have discussed how to find the IRR on a TI84 Plus. We first discussed the definition of IRR and how it is calculated. Then, we showed you how to find the IRR using the TVM solver function on the TI84 Plus. Finally, we provided some tips for using the TVM solver function effectively. We hope that this article has been helpful and that you now know how to find the IRR on your TI84 Plus.
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