Avideo game system and several games are sold for $540. the cost of the games is three times as much as the cost of the system. find the cost of the system and the cost of the games.

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.

you need to rotate this triangle about the origin 270 degrees clockwise to create the full square.