A jet ski that holds 10 gallons of gas
moves across a lake at a constant speed.
When it starts, it is 45 miles from the shore.
After 30 minutes, it is 30 miles from the
shore. Which function describes the jet ski's
distance from the shore?
A. y = x/2 + 45
B. y = - x/2+45
C. y = 2x – 30
D. y = -2x – 15