Question 540943
the function is P = 8b - 136.
P stands for the amount of profit.
b stands for the number of books.
in order to break even, the profit has to be equal to 0 based on this equation.
the equation becoms:
0 = 8b - 136.
add 136 to both sides of this equation to get:
136 = 8b.
divide both sides of this equation by 8 to get:
17 = b.
when b = 17, they break even because 17*8 = 136.
when b < 17, they lose money because profit will be negative.
when b > 17, they make money because profit will be positive.