Video rental stores are being replaced by streaming subscriptions. in one area, there
were 9 video rental locations in 1996, but by 2016, that number had dwindled to 4.
assuming a constant decrease in the number of stores, calculate the unit rate of
change (slope) from 1996 to 2016.

The given problem is about the decrease of two variable, where represent years and represents video rental.

The ratio here refers to the slope of the linear decreasing behaviour, where pairs are (1996,9) and (2016, 4). The formula for the slope is

This means that the linear relation decreases, with a constant ratio of 0.25, that is, video rental decreases one per 4-years periods.

c. 4 and 1/2 pounds is the answer! : )

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.