Question

The average cost of a yearbook, years since 1985, is found in the function f(x)= 0.65x+24.75. What is the average cost of a yearbook in the year 2013?

Answer 1

There has been 28 years since 1985 to 2013, this becomes your x value. Plug x into the equation:

f(x) = (.65*28)+24.75
f(x) = 18.2+24.75
f(x) = 42.95