Question

Is the following relation a function? {(3, −5), (1, 2), (−1, −4), (−2, 2)} yes / no

Answer 1

No

Explanation:

For the relation to be a function

Each x- coordinate must map to exactly 1 unique y- coordinate

For the given relation

the points (1, 2) and (- 2, 2 )

both x- coordinates 1 map to the same y- coordinate 2

Then the relation is not a function