Help asap i raised to 15 points so plz help and i want clear answer The rental rate for a cement mixer has a flat rate of $40 plus $20 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=x+50 b y=25x c y=20x+40 d y=50x+25 e y=75x