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### How to Find the Slope in Cabri Jr. on the TI-84 Plus

In Cabri Jr. for the TI-84 Plus calculator, you can use the **Slope** tool in the **Measure** submenu of the **Appearance** menu to find the slope of a line, segment, or side of a triangle or quadrilateral. [more…]

### Construct Points of Intersection in Cabri Jr.

The Cabri Jr. geometry application for the TI-84 Plus calculator can construct the points of intersection of any pair of the following types of objects: lines, segments, circles, and sides of triangles/polygons [more…]

### Hide and Delete Objects in Cabri Jr.

You can hide and delete objects in the Cabri Jr. geometry application for the TI-84 Plus graphing calculator. There is a big difference between hiding and deleting an object. If you [more…]

### How to Reflect Geometric Objects in Cabri Jr.

Cabri Jr. for the TI-84 Plus calculator allows objects to be reflected in a line or a segment. When a geometric object is reflected in a line, that line acts like a mirror — hence the term “reflection. [more…]

### Tile the Plane in GeoMaster on the TI-84 Plus

The **Symmetry** tool in the **TRFM** menu on the TI-84 Plus calculator can be used to tessellate (tile) the plane with a geometric figure by rotating that object 180 degrees about a specified point. Unlike the [more…]

### Rotate Geometric Objects with the TI-84 Plus

When a geometric object is rotated, it is rotated about a given point through a given angle. To use GeoMaster on the TI-84 Plus graphing calculator to rotate an already constructed geometric object, follow [more…]

### TI-84 Plus C Graphing Calculator Important Keystrokes

The TI-84 Plus C graphing calculator offers some very advanced functions, but to get to those advanced features, you have to know the basic keys to press. The keys to press most often appear in the following [more…]

### Math Functions and Constants on the TI-84 Plus C Graphing Calculator

Your TI-84 Plus C graphing calculator is quite capable of helping you out with math problems and actually comes equipped with ways to include constants and to input standard elements, such as [more…]

### The Basics of Graphing on Your TI-84 Plus C Graphing Calculator

You bought the TI-84 Plus C graphing calculator to help you do graphs, and help you it does. The points in the following list walk you through the steps to take to get your TI-84 Plus C to display a graph [more…]

### TI-84 Plus C Graphing Calculator Zoom Commands

The TI-84 Plus C graphing calculator not only helps you make graphs, but its Zoom commands also help you highlight specific areas of a graph, redraw graphs in certain ratios, and otherwise tweak graphs [more…]

### TI-84 Plus C Graphing Calculator Special Menus

Not only does the TI-84 Plus C graphing calculator help you graph, but it also offers special menus you can use to look at distribution, probability, and even finances. The following list shows all the [more…]

### TI-84 Plus Graphing Calculator For Dummies Cheat Sheet

The TI-84 Plus graphing calculator, the most popular calculator in the world, just got a makeover! Find out the important keystrokes you’ll need to know to use the TI-84 Plus, and learn the math functions [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…]

### Improvements to the TI-84 Plus

Many of the changes to the TI-84 Plus are a direct result of feedback received from teachers and students. After all, Texas Instruments is committed to providing the best tools for the teaching and learning [more…]

### How to Charge the TI-84 Plus C's Battery

The TI-84 Plus C uses a Li–ion battery, similar to the one in your cellphone, which holds a charge for up to two weeks. Texas Instruments (TI) recommends charging your battery for at least four hours for [more…]

### TI-84 Plus Keyboard Basics

The row of keys under the TI-84 Plus calculator screen contains the keys you use when graphing. The next three rows, for the most part, contain editing keys, menu keys, and arrow keys. The arrow keys [more…]

### Edit Entries on the TI-84 Plus Calculator

When using the TI-84 Plus calculator, especially when you first start using it, you are going to make errors or press the wrong keys. The TI-84 Plus calculator offers four ways to edit an entry: [more…]