Using data from 2000 and projected to 2025, the percent p of the U.S. population that uses the Internet can be described by

p = 1.19x + 58.0

where x is the number of years after 1990 (Source:

Nation and Statistics, Policy Exchange Analysis).

(a) Find the slope and the p-intercept of the graph of this equation.

(b) Write a sentence that interprets the meaning of the slope as a rate of change.

(c) Graph the function with x representing the years from 1990 and p representing the percent from 50.