Question

Carla's retirement party will cost $15 if she invites 3 guests. If there are 4 guests, how much will Carla's retirement party cost? Assume the relationship is directly proportional.

Answer 1

If there are 4 guest Carla's retirement party will cost $20.

Explanation:

First, you have to figure out how much money is needed for one guest;

15÷3= $5

Each guest costs $5. Now you just multiply by 5 by 4.

Thus, the answer is $20.

Answer 2

$20

Explanation:

15/3=5 which means that for every guest attending Carla's retirement party it must cost her $5 each.

Therefore if 4 guests come to the party it must mean 4(5) which is 20.

Hence $20