Chapter 1: Polynomial Functions
We decided [0, 16], representing 1990 to 2006, is an appropriate domain for
these functions. We determined this by finding the maximum values of the
functions Y
and Y
for airbags and seatbelts, respectively.
Sample Solution—Motorcycles and Helmets (continued)
x
Press Ly
, then press w(Max). Arrow up or down until
the function you are interested in flashes and press
l. Below we show
two of these maximum points:
We do not believe the number of lives saved as a result of these safety devices
will decrease in the near future, as we believe these products are continuously
being improved and the amount of people in automobile accidents in the
United States is not declining significantly. Notice, this means we believe the
functions allow us to identify trends between 1990 and 2006, but do not allow
us to extrapolate beyond the domain.
b.
Find the y-intercepts of each function. What is the real-world meaning of the
y-intercepts? Explain.
Table
:
x Press p to return to the Main Menu and 7 to access the Table mode.
x Press y(SET) to set the input values for x (t, years) for the table. Let’s
create a table of the lives saved from 1990 to 2006, inclusive. To do so,
input the following values: S
0l and E
16l.
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