Casio fx-7400G PLUS Graphing - Manual (Page 25)

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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 = 3 x
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 = 3 x .
u
!4(SKTCH)3(PLOT)1(Plot)
c,a wwf~f
2. Display the sketch menu and perform the following operation to draw a straight
line between the two points.
u
!4(SKTCH)4(LINE)1(Line)w
• The above draws a straight line between the current pointer location and the
previous pointer location.
u uu u 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)