Question

find the cost of 10 pounds of beans.
beans (lb), x | cost ($), y
5 | 4
10 |

Explanation:

Step1: Find unit cost of beans

$\text{Unit cost} = \frac{\text{Total cost}}{\text{Weight}} = \frac{4}{5} = 0.8$ dollars per lb

Step2: Calculate cost for 10 lbs

$\text{Total cost} = \text{Unit cost} \times \text{Weight} = 0.8 \times 10$

Answer:

8 dollars