Iona is riding her bike to the park. She starts 8 miles from the park and rides at a rate of 15 mph. Write an equation in slope-intercept form that represents her distance from the park after x hours.
Which equation correctly models the situation?
A. y = -8x+15
B. y = -15x+8
C. y = 15x-8
D. y = 8x-15