Question

at the same grocery store, amari buys a loaf of bread and some grapes. the graph shows the total cost of the purchase, y, as a function of the number of pounds of grapes, x. the total cost increases by $ 6 as the number of pounds increases by 2. how can you find the cost per pound? 6 - 2 = 4; $\frac{2}{6}=\frac{1}{3}$; $\frac{6}{2}=3$; 2 + 6 = 8

Explanation:

Step1: Recall cost - per - unit formula

The cost per pound is found by dividing the change in cost by the change in the number of pounds.

Step2: Identify change in cost and pounds

The change in cost is $6$ and the change in the number of pounds is $2$.

Step3: Calculate cost per pound

We use the formula $\frac{\text{Change in cost}}{\text{Change in pounds}}$, so $\frac{6}{2}=3$.

Answer:

$\frac{6}{2}=3$ (the option $\frac{6}{2}=3$ is the correct way to find the cost per pound)