Question

Help on number 4 pleaseStore C: 3 pounds and $6.00Store B: 6 pounds and $9.00

Answer 1

Given that the x-variable indicates weight (in pounds) and the y-variable indicates cost (in dollars), the coordinates for each store are:

Store C: (3, 6)

Store B: (6, 9)

Connecting these two points with a line, we get:

Stores B and C ratios are computed as follows:

`\begin{gathered} \text{ Store C ratio =}\frac{\text{ cost in \$}}{\text{ weight in pounds}}=\frac{6\text{ \$}}{3\text{ pounds}}=2\frac{\text{\$}}{\text{pound}} \\ \text{Store B ratio =}\frac{\text{ cost in \$}}{\text{ weight in pounds}}=\frac{9\text{ \$}}{6\text{ pounds}}=1.5\frac{\text{\$}}{\text{pound}} \end{gathered}`

Given that the ratios are different, then they are not proportional.