TI-84 Plus CE Graphing Calculator For Dummies, 3rd Edition
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The ZStandard, ZDecimal, ZTrip, and ZQuadrant1 zoom commands help you initially graph or regraph your function in a preset viewing window. To use these zoom commands, enter your function into the calculator, press [ZOOM], and then press the key for the number of the command. The graph automatically appears.

ZStandard zoom command on the TI-84 Plus

This command graphs your function in a preset viewing window where

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You access it by pressing [ZOOM][6]. See the first screen.

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This Zoom command is the best way to begin graphing. After graphing the function using ZStandard, you can, if necessary, use the Zoom In and Zoom Out commands to get a better idea of the nature of the graph.

ZDecimal zoom command on the TI-84 Plus

This command graphs your function in a preset viewing window where

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The ZDecimal command is accessed by pressing [ZOOM][4].

When you trace a function graphed in a ZDecimal window, the x-coordinate of the Trace cursor will be a multiple of 0.1.

ZTrig zoom command on the TI-84 Plus

This command, which is most useful when graphing trigonometric functions, graphs your function in a preset viewing window where

image3.jpg

It also sets the tick marks on the x-axis to multiples of π/2. You access ZTrig by pressing [ZOOM][7]. See the second screen.

When you trace a function graphed in a ZTrig window, the x-coordinate of the Trace cursor will be a multiple of π/24.

ZQuadrant1 zoom command on the TI-84 Plus

This command graphs your function in a preset viewing window where

image4.jpg

Of course, only Quadrant I can be viewed in this window. It is accessed by pressing [ZOOM][ALPHA][MATH], or by pressing [ZOOM] and using the up-arrow key to scroll to ZQuadrant1. See the third screen.

When you trace a function graphed in a ZQuadrant1 window, the x-coordinate of the Trace cursor will be a multiple of 0.1.

About This Article

This article is from the book:

About the book author:

Jeff McCalla is a mathematics teacher at St. Mary's Episcopal School in Memphis, TN. He cofounded the TI-Nspire SuperUser group, and received the Presidential Award for Excellence in Science & Mathematics Teaching.

C.C. Edwards is an educator who has presented numerous workshops on using TI calculators.

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