LINEAR FUNCTIONS Graphing And Analysis (Page 6 of 7)

Sometimes when two perpendicular lines are graphed, they may not appear perpendicular because of the distortion created by having a rectangular screen. The ZOOM ZSquare command can be used to adjust the window in a way that "removes" this distortion.

Let's graph y = x + 6 and y = -x - 1, which are perpendicular lines. Start with a standard window.

 Y= key. (Clear any previous functions)

 X,T,theta,n key. Plus key. 6 ENTER key.
 Negation key. X,T,theta,n key. Minus key. 1

 ZOOM key. 6: menu selection.

 Calculator screen image. Calculator screen image.
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