Amerry-go-round is to be built in a park. the center of the structure is required to be equidistant from three support columns located at q(4,−2), r(2,−4), and s(0,2). what are the coordinates for the location of the center of the merry-go-round?

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.