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### 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…]

### 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 Analyze Statistical Data on the TI-84

The TI-84 Plus calculator can perform one- and two-variable statistical data analysis. For one-variable data analysis, the statistical data variable is denoted by [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 Evaluate Factorials on the TI-84 Plus

Did you know you can type an exclamation point on your TI-84 Plus calculator? Mathematically, the exclamation point is called a *factorial.* Usually students learn about factorials in pre-algebra and then [more…]

### Permutations and Combinations and the TI-84 Plus

You can work permutations and combinations on the TI-84 Plus calculator. A *permutation,* denoted by **nPr**, answers the question: “From a set of **n** different items, how many ways can you select [more…]

### How to Use the Binomial Theorem on the TI-84 Plus

In math class, you may be asked to expand binomials, and your TI-84 Plus calculator can help. This isn’t too bad if the binomial is (2x+1)^{2} = (2x+1)(2x+1) [more…]

### How to Generate Random Numbers on the TI-84 Plus

Your TI-84 Plus calculator has a massive amount of digits arranged in a list, called a random number table, that it uses to generate random numbers. [more…]

### How to Enter Statistical Data in the TI-84 Plus

What you use to enter statistical data into the TI-84 Plus calculator is the Stat List editor — a relatively large spreadsheet that can accommodate up to 20 columns [more…]

### How to Delete and Edit Data on the TI-84 Plus

When you are working with statistical data on your TI-84 Plus calculator, sooner or later, you’ll have to remove or modify the data that you’ve placed in a data list. The following descriptions show you [more…]