Please help me with this

Construct the graph that models the given situation

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?

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)