Choose a useful graph window

01

Press these keys

WINDOWZOOM6:ZStandard0:ZoomFit

02

Walkthrough

1
Estimate domain and range
Use the question or a table to predict useful x and y values.
2
Set WINDOW
Choose Xmin<Xmax and Ymin<Ymax; use sensible Xscl/Yscl.
3
Refine
ZStandard resets both axes to about −10…10; ZoomFit adjusts y for the current x-window.

03

Worked example

View y=0.02(x−50)²+3 for 0≤x≤100.

NORMAL FLOAT AUTO REAL MPXmin=0 Xmax=100Ymin=0 Ymax=60

AnswerA 0–100 x-window reveals the vertex at (50,3).