Question

Tony operates a skate rental company. He charges an equipment fee of $3 plus $6 per hour. Which equation represents this linear relationship?

Answer 1

`y=6x+3`

Explanation:

I'll use `y` to represent total cost and `x` to represent cost per hour

`3` is a fixed cost, rentals cost `$6` per hour

Two hours cost `6*2` dollars, three hours cost `6*3` dollars, and so on

`x` hours cost `6*x` dollars (`x` could represent any number of hours)

`y=6x+3 rarr` The $3 must be paid regardless of how many hours the skates have been rented, so the $3 must be added on to the `6x`