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How to Put X 5 in Graphing Calculator Ti83plus

Reviewed by Calculator Editorial Team

This guide explains how to enter and graph the equation x 5 in your TI-83 Plus graphing calculator. Whether you're a student or educator, these instructions will help you visualize and analyze the linear function y = 5x.

Introduction

The TI-83 Plus is a powerful graphing calculator used in mathematics and science education. One of its key features is the ability to graph functions, which helps visualize mathematical relationships. In this guide, we'll focus on entering and graphing the simple linear function y = 5x.

Graphing functions allows you to see how the output (y) changes as the input (x) changes. For y = 5x, this means the output is always 5 times the input, creating a straight line through the origin with a slope of 5.

Step-by-Step Instructions

Step 1: Turn on your calculator

Press the ON button on the top right corner of your TI-83 Plus calculator. The screen should light up with the TI logo.

Step 2: Access the Y= editor

Press the Y= button (second button from the left in the top row). This will open the Y= editor where you can input functions.

Step 3: Enter the function

Use the arrow keys to position the cursor at the first line under Y1=. Type the following:

  1. Press ALPHA then W to enter the variable x
  2. Press the multiplication symbol (×)
  3. Press 5

Your screen should now show: Y1 = x × 5

Step 4: Set the graph window

Press the WINDOW button (second button from the right in the top row). You'll see the graph window settings. For this function, we recommend:

  • Xmin: -10
  • Xmax: 10
  • Xscl: 1
  • Ymin: -50
  • Ymax: 50
  • Yscl: 10

These settings will give you a clear view of the function's behavior.

Step 5: Graph the function

Press the GRAPH button (second button from the left in the bottom row). Your calculator should display the graph of y = 5x as a straight line passing through the origin (0,0) with a steep slope.

Tip: If the graph doesn't appear, double-check your function entry and window settings. You can also try pressing ZOOM and selecting ZStandard to reset the view.

Worked Example

Let's walk through a complete example of graphing y = 5x on your TI-83 Plus.

Example 1: Basic Graph

  1. Turn on your calculator
  2. Press Y= to access the Y= editor
  3. Enter Y1 = x × 5
  4. Press WINDOW and set:
    • Xmin: -10
    • Xmax: 10
    • Ymin: -50
    • Ymax: 50
  5. Press GRAPH to view the graph

Formula used: y = 5x

This is a linear function where the output (y) is always 5 times the input (x). The graph will be a straight line passing through the origin (0,0) with a slope of 5.

Example 2: Evaluating Points

After graphing, you can evaluate specific points on the function:

  1. Press 2ND then TRACE to access the trace feature
  2. Move the cursor to x = 2 using the arrow keys
  3. Press ENTER to see y = 10
  4. Repeat for other x-values to see how y changes

Troubleshooting

If you're having trouble graphing y = 5x on your TI-83 Plus, try these solutions:

Graph Not Appearing

  • Double-check your function entry (Y1 = x × 5)
  • Verify your window settings (Xmin, Xmax, Ymin, Ymax)
  • Press ZOOM and select ZStandard to reset the view
  • Ensure no other functions are enabled in the Y= editor

Incorrect Graph Shape

  • Adjust your window settings to include more of the function
  • Try different X and Y scales
  • Press 2ND then GRAPH to toggle between connected and dot modes

Calculator Not Responding

  • Turn the calculator off and on again
  • Check for any error messages
  • Battery may need replacement if the calculator won't turn on

FAQ

Can I graph multiple functions at once on the TI-83 Plus?

Yes, you can graph up to 10 functions simultaneously by entering them in Y1 through Y10 in the Y= editor. Each function will appear in a different color on the graph.

How do I change the color of the graph line?

To change the color of your graph line, press 2ND then MODE to access the format menu. Use the arrow keys to select your function (Y1) and press ENTER. Then use the arrow keys to select Color and choose your preferred color.

What if I make a mistake while entering the function?

If you make a mistake, use the arrow keys to navigate to the incorrect character and press DEL to delete it. Then retype the correct character. You can also press CLEAR to start over if needed.

How do I save my graph for later use?

To save your graph, press 2ND then PRGM to access the program menu. Select NewProg and give your program a name. Then record your graphing steps by pressing the appropriate keys. You can run this program later to recreate your graph.