I HATE SUM SOME ONE HELP

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

For each proportion find the unknown number x 1/5/8=×/15

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.