Chapter 9, Problem 14CR

To determine

To write an equation that relates the number of hours with the cost.

Answer to Problem 14CR

The equation is $\text{Cost per hour}=\$9\text{ per hour}$ .

Explanation of Solution

Given information:

The given statement is:

“The cost of renting a paddle boat varies directly with the number of hours, as shown in the table.”

Calculation :

The difference between each hours is $1$ and the difference between each cost is $9$ .

The cost per hours can be written as:

  $\begin{array}{l}\text{Cost per hour}=\frac{\text{Difference in cost}}{\text{Difference in hours}}\\ \text{Cost per hour}=\frac{\text{9}}{\text{1}}\\ \text{Cost per hour}=\$9\text{ per hour}\end{array}$

Hence, the equation is $\text{Cost per hour}=\$9\text{ per hour}$ .