Fostering Advanced Algebraic Thinking with Casio Technology
Sample Solution—Motorcycles and Helmets (continued)
S
M
Equation
:
To compute the average increase in lives saved from 2000 to 2006, let’s
determine how many lives were saved by each of these safety devices in both
2000 and 2006. To do so, substitute x = 10 and x = 16 into each of the
functions, and calculate the corresponding y-values.
Airbags:
L
A
= 0.0444t
4
+ 0.0362t
3
+ 22.361t
2
11.147t + 41.81
L
A
(10) = 0.0444(10)
4
+ 0.0362(10)
3
+ 22.361(10)
2
11.147(10) + 41.81 | 1,759
L
A
(16) = 0.0444(16)
4
+ 0.0362(16)
3
+ 22.361(16)
2
11.147(16) + 41.81 | 2,826
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