Answer:
$25 bag that holds 15 pounds of dog food
Explanation:
We know
There is a $10 bag that holds 8 pounds of dog food.
10 / 8 = $1.25 per pound
There is also a $25 bag that holds 15 pounds of dog food.
25 / 15 = $1.67 per pound
So, $25 bag that holds 15 pounds of dog food is a better buy.