Question

On Thursday after work, the number of cars in a parking lot decreased at a steady rate of 13 cars every 2 minutes. Which rational number describes the number of cars per minute?

Answer 1

find the unit rate: 13/2 = 6.5 cars/min

Answer 2

Required ration which represent the situation =
`(-13)/(2)`

Explanation:

Given: Cars in parking lot decreases at rate of 13 cars every 2 minutes.

To find: Rational Number which represent given information

Rational Number is a number in form of
`(p)/(q)` where p be any integer and q is non zero integer.

So from given information

No of cars decreases in 2 minutes = 13 cars

So, No of cars decreases in 1 minute =
`(13)/(2)`

Therefore rate at which cars decreasing in parking lot is
`(13)/(2)` cars/min.

Since it is decreasing, ration which represent it must be equal to
`(-13)/(2)`

Therefore, Required ration which represent the situation =
`(-13)/(2)`