Question

Determine whether each set of ordered pairs is or is not a function.Sets: 1. {(0,7) (7, -9) (-9,7) 0,7)} 2. {(-3,5) (2, -3) (2, -5) (-5, -3)} .3.{(1, -1) (3, -1) (-4, -1) (5, -1)}

Answer 1

Notice that on set 3, we have a vertical line located in x = -1. Therefore, set 3 is not a function.

Sets 1 and 2 have all their domain values linked with only one value of the range, therefore, sets 1 and 2 are functions