Practice problem
We have a set of ordered pairs: {(2,5),(4,−3),(3,12),(15,−13)}\{(2,5), (4,-3), (3, 12), (15, -13)\}{(2,5),(4,−3),(3,12),(15,−13)} What is the set of inputs?
{2,3,4,15}\{ 2,3,4,15\}{2,3,4,15}
{−13,−3,5,12}\{-13,-3,5,12\}{−13,−3,5,12}
{−13,3,5,15}\{-13,3,5,15\}{−13,3,5,15}
{2,−3,5,12}\{2,-3,5,12\}{2,−3,5,12}
Type a concept, like “slope” or “photosynthesis”.