transformation that moves each point of a graph closer to the - or -axis by a scale factor that is between zero and 1
relation in which each element of the domain corresponds to exactly one element of the range
transformation that moves each point of a graph farther away from the - or -axis by a scale factor that is greater than 1
point where a graph changes from increasing to decreasing or from decreasing to increasing
vertical line test
test that uses vertical lines on a graph to determine whether a relation is a function. If any vertical line intersects the graph in more than one point, the graph does not represent a function.