Select all of the situations that can be described using the equation y = 4x. Javier charges $4 an hour to pet sit. Chris has 4 dogs at home, but he considers buying a fifth dog. Maria discovered that it costs $4 per shirt for her school orchestra. Charlie pays $4 to use the copier at a store, plus 3 cents per copy. Teresa is getting her ink cartridges refilled. It cost $10 for shipping and $4 per cartridge.
