A food truck vendor averages 150 tacos sold when the price per taco is $1. A study shows that the average number of tacos sold will increase by 25 tacos for every $1 that the price per taco is
lowered
Which equation models the food truck's average sales in dollars, S, in terms of the price for taco, x?
A S = 25x + 250
B
S=-25x + 250
C S = x(25x + 250)
D
S = x(-25x + 250)