# >> K-12 >> K-12 For Parents

How to Graph Inequalities on the TI-82

The TI-82 is capable of graphing mathematical inequalities without the need to solve the inequality. In math, an inequality is a sentence that states that two expressions or values are not equal. When an inequality is graphed on the calculator, it serves as a representation of a range of possible solutions to the mathematical sentence. Before graphing the inequality on the TI-82 calculator, you must create an equation by isolating the "y-variable."

Instructions

- 1
  Change the inequality sign "≤" in the inequality to an equal "=" sign. For example, y≤4x+2 becomes y=4x+2.
- 2
  Press the "Y=" key and enter the inequality in the "Y1" position as the newly formed equation. Using the example, enter (4x+2) in the "Y1" position.
- 3
  Press the "2nd" key, then press "Draw." Press the "2nd" key, then press "Prgm."
- 4
  Use the cursor keys arrow keys to scroll down to "Shade" and press "Enter."
- 5
  Press the "Zoom" key and select "ZSquare." Enter "10" in the "Upperfunc" row.
- 6
  Press the "Graph" key to graph the inequality.

Handprint Quilt Ideas for Teachers

Advantages & Disadvantages of School Vouchers