Question

Which set of ordered pairs represents y as a function of X?

A {(-3,-1), (2, -1),(5,2)}
® {(-3,-1), (2, 2), (-3,2)}
© {(-3,-1),(5,2), (-3,2)}
D {(-3,-1), (2, 2), (2,5)}

Answer 1

A

Explanation:

A. Here is why:

In a function, each x maps to exactly one value of y.

In B and C, x = -3 maps to both -1 and 2, is they are not functions.