To create a horizontal line using a calculator, first ensure you are on the graph screen. Then scroll down to the "Horizontal" option under the 4th menu button and press enter. Move the pointer to where you want the horizontal line placed and click enter to lock it in. The key steps are to start on the graph screen, select "Horizontal", position the line, and press enter to finalize it.

1. Create Horizontal Lines with your Calculator
A Few Tips: After you move your Horizontal
Line where you want it you MUST click Enter.
This is the only way to lock in the Horizontal
Line
You should now see the
draw screen
Make sure that you are
on the Graph Screen first
Click the 2nd button
Scroll down to 4:Horizontal click
Enter. Now just move your pointer
to where you want your vertical
line to be located. Remember that
Horizontal is side to side and not up
and down
Horizontal
Line
Congratulations you have made your first
Horizontal Line.