Identify the function that is not exponential. y = −2(0.1)x y = 3(0.2)x y = 5(0.4)x y = −2x3

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.