Zooming, Examples: plotting, Setup-plot – HP 38g Graphing Calculator User Manual

Page 72: Examples: plotting -8

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Undefined

If, during plotting, a real value for the expression is not found,

Points

then that point is not plotted, and no line is connected

through it.

Tracing a Plot

When a graph is nev/ly drawn, TRACE mode is on. Pressing a

cursor key will trace the crosshairs along the graph, displaying

the coordinate values as they move.

Scrolling a Plot

In Function and Sequence aplets, you can scroll left and right

beyond the edge of the window to see more of the graph.

Zooming

Press

I PLOT [{{ZOOM}}

for a choice of zooming options. To

switch to a predefined axis scaling (such as Trig or Integer),

press ■

[VIEWS].

Examples: Plotting

Function

Plot the expression from the previous Function example,

Example

x' - 2x + 3 . In Plot Setup, specify YRNG ; - 3 . 1

5 so

that you can see more of the graph (the default values are

-3.1 and 3.2). You can leave the other plot settings at their

default values.

( O

Select

Function

{{START}}

Make sure the correct function

is highlighted and checked.

■ {SETUP-PLOT}

ryjfFlSfwriRl

1^*

FUNCTION

PLOT SETUPS*

HRNG:

-6.5

6.5

VfiNQ:

-3.1

«TICK:

VTICK: 1

fiES:

Faster

ENTER HDRiZDNTAL TICK iPACIMS

mm\

I PLOT I

{F}

6 times

(The cursor starts in the

center of the X -range and

traces the plot.)

, ,

« :

. 6

FlC«

i :

E.OIS liil:t!lll

3-8 Plotting and Exploring Fnnctions