Question

Which set of ordered pairs represents a function?

A {(1,1),(5, -9), (1,7), (8, -4)}

B {(-9, -1),(-9,5), (9,6), (-7,7)}

C {(-7,7), (1, -9), (6, 7), (-1,3)}

D {(-7, -6),(-4,2), (-7, -9), (1, -6)}

Answer 1

C

Explanation:

The easiest way to solve these problems is usually to just look at the x values and see if any of them appear more than once. If you have 2 or more of the same x value in one set, it isn't a function. If every x value is different, it is a function