What is the slope of the line?

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.

Can someone me with my math problem pls my teacher is on my back about this

Consider the linear function that is represented by the equation y= 4x+5