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ZStandard, ZDecimal, and ZTrig Zoom Commands on the TI-84 Plus

The ZStandard, ZDecimal, and ZTrig Zoom commands on the TI-84 Plus graphing calculator help you to initially graph or regraph your function in a preset viewing window.

  • ZStandard: This command graphs your function in a preset viewing window where

    image0.png

    and

    image1.png

    You access it by pressing [ZOOM][6].

    This is a nice Zoom command to use when you haven’t the slightest idea what size viewing window to use for your function. 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: This command graphs your function in a preset viewing window where

    image2.png

    and

    image3.png

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

    image4.png

    and

    image5.png

    It also sets the tick marks on the x-axis to multiples of

    image6.png

    You access ZTrig by pressing [ZOOM][7].

    When you trace a function graphed in a ZTrig window, the x-coordinate of the trace cursor will be a multiple of

    image7.png

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.

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