Someone help pleasee

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

What is the rate for one gallon of gasoline