If you throw a red stone into the blue sea what it will become? please at least try and not just get free points

A purple stone. Because if you mix red and blue, you get purple.

hm let me think hm think think hm think yes

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.