Chapter 4.1, Problem 121SE

Suppose that average annual income (in dollars) forthe years 1990 through 1999 is given by the linearfunction: $I\left(x\right)=1,054x+23,286$ , where x is thenumber of years after 1990. Which of the followinginterprets the slope in the context of the problem?

a. As of 1990, average annual income was $23,286.

b. In the ten-year period from 1990-1999, averageannual income increased by a total of $1,054.

c. Each year in the decade of the 1990s, averageannual income increased by $1,054.

d. Average annual income rose to a level of $23,286 bythe end of 1999.