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Shading areas of a graph – Texas Instruments TI-86 User Manual

Page 116

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104

Chapter 6: Graph Tools

06TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 104 of 22

06TOOLS.DOC TI-86, Chap 6, US English Bob Fedorisko Revised: 02/13/01 2:23 PM Printed: 02/13/01 3:01 PM Page 104 of 22

Shading Areas of a Graph

To shade an area of a graph, the syntax is:

Shade(

lowerFunc

,

upperFunc

ã

,

xLeft

,

xRight

,

pattern

,

patternRes

ä

)

pattern

specifies one of four shading patterns.

1

vertical (default)

2

horizontal

3

negative slope( 45

¡)

4

positive slope (45

¡)

patternRes

specifies one of eight shading resolutions.

1

every pixel (default)

2

every second pixel

3

every third pixel

4

every fourth pixel

5

every fifth pixel

6

every sixth pixel

7

every seventh pixel

8

every eighth pixel

The area that is specifically above lowerFunc and below upperFunc is shaded.

xLeft

>

xMin

and xRight <

xMax

must be true.

xLeft

and xRight specify left and right bounds for shading. (

xMin

and

xMax

are defaults.)

These

GRAPH

DRAW

menu items are interactive. Also, you can use all of them, except

PEN

,

on the home screen or in a program (A to Z Reference).

LINE

Draws a line segment from one point to another point you specify with the cursor

VERT

Draws a vertical line, which you can move to any displayed

x

value

To replicate the example
without additional graphs,
turn off all equations and stat
plots before entering the
instructions as shown.