Read each scenario below. Determine if the situation is proportional or not. If it is proportional, then write an equation to represent it.

3. A restaurant charges $10.00 for a medium pizza and $1.00 for each topping.

4. A restaurant has an all-you-can-eat buffet. They charge $8.75 per person.

5. A restaurant charges $1.50 for a fountain drink with free refills.

6. A restaurant has a build-your-own salad option. It is $3.80 per pound of salad.

7. A vehicle travels at a rate of 65 miles per hour.