Operation Manual

Chapter 17: Activities 302

Zooming In on the Graph

To help identify maximums, minimums, roots, and intersections of functions, you can magnify the

viewing window at a specific location using the ZOOM instructions.

You also can enter your estimate for the

maximum value of

6. Press

3 Ë 8. When you press a number key

while in

TRACE, the X= prompt is displayed

in the bottom-left corner.

7. Press Í.

The trace cursor jumps to the point on the

Y1 function evaluated at X=3.8.

8. Press | and ~ until you are on the

maximum

Y value.

This is the maximum of Y1(X) for the X

pixel values. The actual, precise maximum

may lie between pixel values.

1. Press q to display the

ZOOM menu.

This menu is a typical TI-84 Plus C menu. To

select an item, you can either press the

number or letter next to the item, or you

can press † until the item number or letter

is highlighted, and then press Í.

2. Press

2 to select 2:Zoom In.