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### How to Find the Value of a Function on the TI-84 Plus

When you trace the graph of a function on the TI-84 Plus graphing calculator, the trace cursor doesn’t hit every point on the graph. So tracing is not a reliable way of finding the value of a function [more…]

### How to Start and Quit Transformation Graphing

With the Transformation Graphing application that comes preloaded on the TI-84 Plus family of graphing calculators, you can investigate transformations of a graph without leaving the graphing screen. [more…]

### How to Graph Transformations on the TI-84 Plus

The Transformation Graphing application on the TI-84 Plus graphing calculator graphs transformations in three different ways called *play types:* Play-Pause [more…]

### How to Create a Slide Show on the TI-84 Plus

A slide show allows you to view the graphs of a sequence of transformations of a function. Each picture in the slide show displays one transformation, and you can run your slides in slow or fast motion [more…]

### How to Start and Quit Inequality Graphing on the TI-84 Plus

With the Inequality Graphing application that comes preloaded on the TI-84 Plus family of graphing calculators, you can graph functions and inequalities. You can even graph and shade regions formed by [more…]

### How to Enter Inequalities in the Y= Editor

The Inequality Graphing application on the TI-84 Plus graphing calculator can graph certain functions and inequalities defined in the Y= editor. These functions and inequalities are in the form [more…]

### How to Enter Inequalities in the X= Editor

The Inequality Graphing application on the TI-84 Plus can graph equalities and inequalities defined in the X= editor and in the following forms, provided that N is a number: [more…]

### How to Find the Zeroes of a Function with the TI-84 Plus

You can use your TI-84 Plus calculator to find the zeroes of a function. The *zeros* of the function *y* = *f*(*x*) are the solutions to the equation *f*(*x*) = 0. Because [more…]

### How to Find the Minimum and Maximum Points on a Graph

Finding the maximum or minimum point on a graph on your TI-84 Plus calculator has many useful applications. For example, the maximum point on the graph of a profit function tells you not only the maximum [more…]

### How to Find Points of Intersection on the TI-84 Plus

You can use the TI-84 Plus calculator to find accurate points of intersection for two graphs. Using the arrow keys in a graph activates a free-moving trace. However, using a free-moving trace rarely locates [more…]

### Find the Slope of a Curve with the TI-84 Plus

You can find the slope of a curve with the TI-84 Plus calculator, even though it is not equipped to find the derivative of a function. For example, it can't tell you that the derivative of [more…]

### Evaluate a Definite Integral with the TI-84 Plus

You can use your TI-84 Plus calculator to evaluate a definite integral, which gives the area between the curve and the *x*-axis. For example, if *f*(*x*) is positive for [more…]

### How to Compose Functions on the TI-84 Plus

Sometimes functions are composed together. This may look like, *f*(*g*(*x*)). Function composition is really just substituting one function into another function. Fortunately, you can use your TI-84 Plus calculator [more…]

### Graph the Derivative of a Function on the TI-84 Plus

In calculus, you need to graph the derivative of a function in order to find its critical points, which you can do on your TI-84 Plus calculator. Just follow these steps: [more…]

### Solve Equations by Graphing on Your TI-84 Plus

There are a number of different ways to solve an equation by graphing on your TI-84 Plus calculator. The basic idea is to set the equation equal to zero, graph it, and find the zeros. This method has a [more…]

### How to Draw the Inverse of a Function on the TI-84 Plus

The big idea of inverse function is that *x* and *y*switch places. Your TI-84 Plus calculator has a built-in feature that enables you to "draw" the inverse of a function. Essentially, the calculator is [more…]

### How to Enter Functions on the TI-84 Plus

Before you can graph a function on your TI-84 Plus calculator, you must enter it into the calculator. The calculator can handle up to ten functions at once, [more…]

### How to Graph Functions on the TI-84 Plus

After you have entered functions into the TI-84 Plus calculator and formatted your graph, you’re almost ready to start your graphing fun. Once you get the hang of graphing, you won’t need to go through [more…]

### Format Menu Options on the TI-84 Plus

The TI-84 Plus calculator has a variety of features that help you easily format the graph of a function. Set the graph format settings by following these steps: [more…]

### How to Adjust the Color/Line Settings on Your TI-84 Plus Graph

If you’re graphing several functions on your TI-84 Plus calculator at once, your calculator automatically graphs each function in a different color. If you have the TI-84 Plus C, you may want to change [more…]

### How to Graph Piecewise-Defined Functions on the TI-84 Plus

A *piecewise function* is actually made up of “pieces” of different functions. Each function “piece” is defined over a certain interval. Using your TI-84 Plus calculator to graph piecewise functions can [more…]

### How to Graph Trig Functions on the TI-84 Plus

The TI-84 Plus calculator has built-in features especially designed for graphing trigonometric functions. They produce graphs that look like graphs you see in textbooks, and when you trace these graphs [more…]

### View Function and Graph on Same TI-84 Plus Screen

If you’re planning to play around with the definition of a function you’re graphing on your TI-84 Plus calculator, it’s quite handy to have both the Y= editor and the graph on the same screen. That way [more…]

### Save and Recall a Graph on the TI-84 Plus

If you want to save your graph as a Graph Database on your TI-84 Plus calculator, when you recall the graph at a later time, the graph remains interactive. This means that you can, for example, trace the [more…]

### How to Trace a Graph on the TI-84 Plus

After you graph a function on your TI-84 Plus calculator, you can press [TRACE] and use the right-arrow and left-arrow keys to more closely investigate the function. [more…]