20070201
5-2-10
Controlling What Appears on a Graph Screen
Example Enlarge the graphs of the two expressions shown below fi ve times on
both the x - and y -axis to see if they are tangent.
Y1 = (
x + 4)( x + 1)( x – 3), Y2 = 3 x + 22
Use the following V-Window settings.
Xmin = –8, Xmax = 8, Xscale = 1
Ymin = –30, Ymax = 30, Yscale = 5
Procedure
1 m GRAPH
!3 (V-WIN) - i w i w b w c
- da w da w f wJ
3 (TYPE)1 (Y=) ( v +e)( v +b)
( v -d) w
d v +cc w
6 (DRAW)
2 !2 (ZOOM)2 (FACT)f w f wJ
3 !2 (ZOOM)3 (IN)
4 f ~f ,d ~d w
Result Screen
# You can repeat factor zoom to enlarge or
reduce a graph even further.
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