11. Which of the following represents a non-proportional relationship?

Sam gets $15 a week for his allowance. In 4 weeks he has $60.

Sara works on commission. She makes $60 a week plus a
percentage of her total sales.

Rebecca works at a local restaurant as a hostess. She makes $7 an
hour. She worked 4 hours on Saturday and made $28.

Ryan makes $2 per candy bar he sells. He sold 15 candy bars and
made $30.

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