Question

(-7,4),(-8,3)(-7,7),(-20,8),(5,9),(3,1),(2,6) state whether each set of ordered pairs represents a function

Answer 1

This relation is NOT a function.

Explanation:

Just check the x's. If you have a repeat (the first x is -7, but so is the x on the third point)

If the x's repeat it has to be exactly the same point (same y both times)

If the x's repeat and have different y's, then the relation is NOT a function.