User`s guide

Graphing Chapter 4

In the RUN or PRGM Mode

Example To draw a line perpendicular to the x-axis from point (x, y) = (2, 6)

on the graph

y = 3x

Use the following View Window parameters:

Xmin = –2 Ymin = –2

Xmax = 5 Ymax = 10

Xscl = 1 Yscl = 2

1. After drawing the graph, use the procedure under “To plot points” to move the

pointer to (

x, y) = (2, 0), then use the cursor key (f) to move the pointer on the

graph

y = 3x.

!4(SKTCH)3(PLOT)1(Plot)

c,awwf~f

2. Display the sketch menu and perform the following operation to draw a straight

line between the two points.

!4(SKTCH)4(LINE)1(Line)w

• The above draws a straight line between the current pointer location and the

previous pointer location.

uTo draw vertical and horizontal lines

The procedures presented here draw vertical and horizontal lines that pass through

a specific coordinate.

In the STAT, GRAPH or TABLE Mode

Example To draw a vertical line on the graph of y = x(x + 2)(x – 2)

1. After graphing the function, display the sketch menu and perform the following

operation to display the pointer and draw a vertical line through its current loca-

tion.

!4(SKTCH)[1(Vert)