An equation represents a proportional relationship. For every 4 units that the x-values of the graph of the equation increase, the y-values decrease by 5 units. Which graph best represents the relationship?

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.