Assume the number of U.S. dial-up Internet households stood at 38.5 million at the beginning of 2004 and was projected to decline at the rate of 3.5 million households per year for the next 9 years.

Question

(a) Find a linear function f giving the projected U.S. dial-up Internet households (in millions) in year t, where t = 0 corresponds to the beginning of 2004.
f(t) = ______
(b) What is the projected number of U.S. dial-up Internet households at the beginning of 2013?
______million households

Answer 1

clearly the slope is -3.5

Now think f=mt+b