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168
kk
kk
k Determining Points of Intersection for Two Graphs
Example To draw the following three graphs and then determine the points
of intersection for the Graph A and Graph C.
View Window: (A)
Graph A: y = x + 1
Graph B: y = x (x + 2) (x – 2)
Graph C: y = x
2
!5(G-Solv)
5(ISCT)
(This puts the unit into standby waiting
for selection of a graph.)
Specify Graph A.
w
• Pressing w changes “ k ” into “ ◆ ” for speci-
fication of the first graph.
Specify the second graph (Graph C, here) to determine the points of intersection.
cw
• Use f and c to move “ k ” on the second
graph.
• Intersections are found starting from the left.
e
• The next intersection to the right is found. If
there is no intersection to the right, nothing
happens when you perform this operation.
• You can use d to move back to the left.
• If there are only two graphs, pressing 5 (ISCT) directly displays the intersec-
tions (selection of the graph is not required).
9 - 2 Analyzing a Function Graph
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