At a restaurant the ratio of kids meal, how manys sold to adult meals sold was 9: 2. if there were 81 kids meals sold, how many adult meals sold?

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.

sweetheart, there isn't a cube below.