Question

Look at these sets of ordered pairs.

W) {(8, 9), (2, 3), (0, -2), (10, -9)}
X) {(0, 0), (5, 10), (-3, 3)}
Y) {(1, 1), (2, 2), (3, 3), (4, 4)}
Z) {(-10, 1), (-9, 3), (-4, 5)}
Which of the sets represent functions?
A. W, X
B. X, Y, Z
C. W, Z
D. W, X, Y, Z

Answer 1

It's D.

Explanation:

There are no repetitions of the x values in the ordered pairs so they are all functions.