quiz question that has me stumped

timer Asked: Jan 23rd, 2016

Question description

The following table shows the percentage P = P(d) of the American food dollar that was spent on eating away from home (at restaurants, for example) as a function of the date d.

d = Year P = Percent spent
away from home
1969 25%
1989 30%
2009 34%

(a) Find P(1969).
1 %

Explain what P(1969) means.


(b) What does P(1999) mean?


Estimate P(1999). (Round your answer to the nearest integer.)
4 %

(c) What is the average rate of change per year in percentage of the food dollar spent away from home for the period from 1989 to 2009?
5 % points per year

(d) What does P(2008) mean?


Estimate P(2008). (Hint: Your calculation in part (c) should be useful.)
7 %

(e) Estimate the value of P(2014).
8 %

Explain how you made your estimate.
P(2014)  =  34 + 9 × 0.2
   =  10 %

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