Question

The cost of renting roller blades is $4 plus $3.50 for each hour that the roller blades are rented. Write an expression to represent the cost in dollars of renting roller blades for h hours?

Answer 1

The expression is equal to
`3.50h+4`

Explanation:

Let

x ----> the number of hours that the roller blades are rented

y ----> the cost of renting roller blades in dollars

we know that

The linear equation in slope intercept form is equal to

`y=mx+b`

where

m is the slope or unit rate of the linear equation

b is the y-intercept or initial value of the linear equation

In this problem we have

The slope is equal to

`m=\$3.50\ per\ hour`

The y-intercept is equal to

`b=\$4` ----> value of y when the value of x is equal to zero

substitute

`y=3.50x+4`

For x=h hours

substitute

`y=3.50h+4`