Which of the following scenarios describe proportional relationships? Check all that are true.

A punch recipe requires 8
4
5
ounces of sorbet for each gallon of lemon-lime soda.

The bakery sells doughnuts at $2.75 for each
1
2
dozen.

Jon earns 7 hours of vacation time for every 80 hours he works.

Cicely swims 5
1
2
kilometers on Wednesday, 10
1
4
kilometers on Thursday, and 7
3
4
kilometers on Friday.