Casio FX-CG10 - Page 14

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Fostering Advanced Algebraic Thinking with Casio Technology
Sample Solution—Motorcycles and Helmets
a.
Graph all three functions on the same xycoordinate plane. For what domain
do you think these functions will provide accurate estimates of the lives saved
as a result of these safety devices?
Graph
:
x
Press p to return to the Main Menu, then 5 to access the Graph
mode.
x Enter the three functions in as Y
Y1
, Y
Y2
, and Y
Y3
.
x Set the view window by pressing Le
(V-Window)
. The time in years
since 1990 must be greater than or equal to 0. We have chosen to set
the input values for the view-window as 0 to 30. To do so, input the
following values: X
Xmin:
0l; X
Xmax:
30l; s
scale:
2l.
x
Similarly, the number of lives saved must be greater than or equal to 0;
so we have chosen to input the following values: Y
Ymin
: 0l; Y
Ymax:
20000l; s
scale:
1000l.
x Press d to return to the equation screen, and press u(DRAW) to
draw the graph of the equation in the view window you defined.
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