Steve wants to start his own t-shirt business. his initial costs to get the business going are $1,500. it also costs on average $3 per shirt. steve charges $10 for each shirt he sells. which of the following systems is correct for this model to find the break-even point if "x" = the number of shirts sold and "y" = the number of dollars of expense or income? y = 10x + 1500 and y = 3x + 1500 y = 10x and y = 3x y = 10x and y = 3x + 1500 none of these choices are correct.