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### Tracing Features of the TI-84 Plus C Calculator

The TI-84 Plus C calculator allows you to change the *TraceStep*. The *TraceStep* is the amount the *x*-value changes each time you press right- or left-arrow keys when tracing a function. The default TraceStep [more…]

### ZStandard, ZDecimal, ZTrig, and ZQuadrant1 Zoom Commands on the TI-84 Plus

The ZStandard, ZDecimal, ZTrip, and ZQuadrant1 zoom commands help you initially graph or regraph your function in a preset viewing window. To use these zoom commands, enter your function into the calculator [more…]

### ZoomFit, ZoomStat, ZSquare, and ZInteger Commands on the TI-84 Plus

The ZoomFit and ZoomStat zoom commands on the TI-84 Plus calculator help you find an appropriate viewing window for the graph of your functions. The ZSquare and ZInteger zoom commands readjust the viewing [more…]

### Zoom In, Zoom Out, and ZBox Commands on the TI-84 Plus

If you've already graphed a function on your TI-84 Plus calculator, you can use the Zoom In, Zoom Out, and ZBox commands to zoom in or zoom out. [more…]

### Store and Recall Your Favorite Graphing Window on the TI-84 Plus

You can make a preset graphing window of your own on your TI-84 Plus calculator. Maybe you (or your teacher) have a favorite setting for a graphing window? For example, a [more…]

### How to Display Functions in a Table on the TI-84 Plus

After you’ve entered functions in the Y= editor of your TI-84 Plus calculator, you can have the calculator create a table of functional values. The table values are automatically color-coded to match the [more…]

### How to View TI-84 Plus Tables and Graphs on Same Screen

After you have used your TI-84 Plus to graph your functions and create a table of functional values, you can view the graph and the table on the same screen. To do so, follow these steps: [more…]

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

If you want to substitute a value in a function, you could accomplish this task by using paper and a pencil. However, wouldn’t it be easier to use your on your TI-84 Plus calculator to find the value of [more…]

### ZFrac Zoom Commands on the TI-84 Plus

The ZFrac1/2, ZFrac1/3, ZFrac 1/4, ZFrac1/5, ZFrac 1/8, and ZFrac1/10 zoom commands enable you to trace graphs on your TI-84 Plus calculator by fraction steps. [more…]

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

The Inequality Graphing app on your TI-84 Plus calculator can graph functions and inequalities that are defined in the Y= editor. Follow these steps to define a function or inequality of the form [more…]

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

You can use the X= editor in your TI-84 Plus calculator to define some equalities and inequalities. Equalities and inequalities of the following form are defined in the X [more…]

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

As with functions on your TI-84 Plus calculator, if the inequality sign in the definition of the inequality is highlighted, then that inequality will be graphed; if it isn’t highlighted, it won’t be graphed [more…]

### How to Shade Graph Unions and Intersections on Your TI-84 Plus

When a graph is displayed on your TI-84 Plus calculator, three options appear at the bottom of the screen. The Shades option redraws the graph shading only at the union or intersection of the regions. [more…]

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

The **Pt of Intersection-Trace** option on your TI-84 Plus is used to find the points of intersection appearing on the graph screen. When the calculator finds such a point, you can store the [more…]

### How to Store Data Points in Inequality Graphing on the TI-84 Plus

When you start Inequality Graphing on the TI-84 Plus for the first time, the app creates two lists, INEQX and INEQY, to house the *x*- and *y*-coordinates of data points that you store in the calculator. When [more…]

### How to Solve Linear Programming Problems on the TI-84 Plus

*Linear programming* is a method for finding the maximum or minimum value of a multivariable function that is constrained by a system of inequalities. The following example should help you understand this [more…]

### How to Graph One-Variable Inequalities on the TI-84 Plus

Your TI-84 Plus calculator was not made to graph inequalities on a number line, but it can be used to accomplish that task. The reason your calculator is able to perform a task that it was not designed [more…]

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

The Inequality app on your TI-84 Plus calculator is a powerful mathematics tool. To start the Inequality app, press [APPS]. See the first screen. Then, press [more…]

### How to Graph Polar Equations on Your TI-84 Plus

After you have set the window and entered the polar equation, graphing the equations on your TI-84 Plus is easy. Before you press [GRAPH], make sure you watch the direction as your graph is created. If [more…]

### How to Enter Parametric Equations in the TI-84 Plus

You can enter and then graph parametric equations in your TI-84 Plus calculator. Parametric equations are used in Pre-calculus and Physics classes as a convenient way to define [more…]

### How to Graph Parametric Equations on the TI-84 Plus

Anything that can be graphed in Function mode on the TI-84 Plus an also be graphed as a set of parametric equations. Using parametric equations enables you to investigate horizontal distance, [more…]

### How to Enter Polar Equations in the TI-84 Plus

The TI-84 Plus graphing calculator enables you to enter and graph polar equations. A polar coordinate system is used in Pre-calculus class as yet another way to define a point. [more…]

### How to Set the TI-84 Plus Window for Polar Equation Graphs

Before graphing a polar graph, you need to set the window of your TI-84 Plus calculator. If your graph seems incomplete, it is probably due to the way you set your window variables. The variables that [more…]

### How to Enter Sequences into the TI-84 Plus

Sequences make interesting graphs! You need to learn how to set the mode and select the color before entering a sequence in your TI-84 Plus calculator. Then, you can have the fun of graphing a sequence [more…]

### How to Set the TI-84 Plus Window and Graph Sequences

On the TI-84 Plus calculator, it's difficult to get a nice viewing window for your sequence on your first attempt. Understanding the basics of sequence notation should help. Here are the variables used [more…]