Okay so f(n) is the range and n is the domain. The graph should be inclined up crossing (0,0). The domin is (0, infinity) because is she woulds 0 hours then Julia will get paid $0 so it starts at 0 and goes to inifinity.
19 yards divided by 2.5 minutes.
=19/2.5
= 7.6 yards/minute