To determine if the quantities in the data table are in a proportional relationship, we need to check if the ratio of pounds of bananas to the cost is constant.
Let's calculate the cost per pound for each entry:
- For 2 pounds: Cost = $2.50 → Cost per pound = 2.50 / 2 = $1.25
- For 3 pounds: Cost = $3.75 → Cost per pound = 3.75 / 3 = $1.25
- For 5 pounds: Cost = $6.25 → Cost per pound = 6.25 / 5 = $1.25
- For 7 pounds: Cost = $8.75 → Cost per pound = 8.75 / 7 = $1.25
Since the cost per pound is constant at $1.25 for all the quantities, the quantities in the data table are in a proportional relationship.
Therefore, the answer is 1.