Question

Lee belongs to a movie club where each month he pays a base fee of $5 and is then able to rent movies at $2 each for the remainder of the

month. The table below shows the relationship between the number of movies Lee rents in a month and the total cost.
Number of Movies
2
4
6
7
Total Cost
$9
$13
$17
?

Answer 1

7 rentals in a month is $19.

Explanation:

Let y be Lee's total cost of renting movies for a month, and x the number of movies he rents that month.

We can write an equation for this:

1. y = $5 [he pays a base fee of $5]

2. y = $5 + $2x [rent movies at $2 each]

Use this equation to calculate a month's rent for each of the scenarios isted in the question. If the equation correctly predicts the month's rent for the know cases, use it to calculate the month with 7 rentals.

See the attached worksheet. The month with 7 rentals is $19.