17) eric sells shirts. it costs him $100 to buy all the shirts and $10, total, to print designs on them. eric sells each shirt for $4. so far he has sold 20 shirts. he uses the equation y = 4x - 110 to calculate his profit. what is the constant in eric’s equation? a) 4 b) -10 c) 20 d) -110?me its exam time and i didn't pay attention