Determine which set of ordered pairs is a function.

a.{ (-1,3), (1,4), (-1,5) }

b. { (5,3), (-6,3), (-2,4) }

c. { (0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6) }

d. { (1,2), (-5,4), (3,6), (-5,2) }

A set of ordered pairs is not a function if the same x value has a different y value with it.

In a set A) we have: ( - 1, 3) and ( - 1, 5). In C) we have (0.5, 1.6) and (0.5, 3.6). In D) there are ( - 5, 4) and ( - 5, 2).

Answer:

B) { (5, 3), ( - 6, 3), ( - 2, 4) }

In a function the x value will not repeat. The answer is B.