Write an equation in Slope intercept form (y=mx+b) for the line with the given slope (m) and y-intercept (b) m=4,b=-3

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.