Does the graph above represent a function?

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?

Which is the standard form for this number? (2 x 10) + (5 x 1) + (8 x 1 10,000 )

Write a linear funtion f with the values f(2)=-1, and f(5)=4