What's the equation for each phone bill when y i'd total cost and x is total number of minutes on phone

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)

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.

Twelve less than a number is at most 20