Question

The table shows the cost of shampoo at a discount store Cost $ 2.95 $4.50 $6.05 Number of bottles 1 2 3is the cost of the shampoo bottles proportional to the amount of bottles ?

Answer 1

Answer:

Not proportional

Explanation:

First, we determine the unit rate for each of the pairs of points.

$\begin{gathered} UnitRate=\frac{\text{Cost}}{\text{Number of bottles}} \\ \frac{2.95}{1}=\ 2.95\text{ per bottle} \\ \frac{4.50}{2}=\ 2.25\text{ per bottle} \\ \frac{6.05}{3}=\ 2.02\text{ per bottle} \end{gathered}$

We see that the unit rates are not the same.

Therefore, the cost of the shampoo bottles IS NOT proportional to the number of bottles