Question

9

13. A grocery store sells 12 bottles of water for $8 and 36 bottles of water for $20.
Is the cost of the water proportional to the number sold? Explain.
a) Proportional because the unit rates are $1.50 per bottle.
b) Proportional because the unit rates are $1.80 per bottle.
c) Nonproportional because the bottles have different unit rates.
d) Nonproportional because one grocery store has more bottles.

Answer 1

The correct answer is c

Answer 2

$8/12 bottles = $2/3 per bottle
$20/36 bottles = $5/9 per bottle
The unit rates are not the same, so c) nonproportional because the bottles have different unit rates.