To rent a moving truck for the day, it costs $33 plus $1 for each mile driven. a. Write an expression that represents the cost (in dollars) to rent the truck. Let $m$ represent the number of miles driven.

b. You drive the truck 300 miles. How much do you pay?

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.