The rental rate for a hedge trimmer has a one time fee of $20 plus $30 for each day of the rental. The graph shows points representing the total cost of the rental.
Which linear equation, in slope-intercept form, that models the total cost of the rental over time?
A. y = 20x
B. y = 30x + 20
C. y = 30x
D. y = 20x + 30
E. y = 2x + 80
