Question

If f = {(2,5), (3, 2) (4, 6), (5, 1), (2, 2)), then f is a function.

Answer 1

false

Explanation:

f is not a function because you can see that two of the points are (2,5) and (2,2). A function can only have one corresponding y-coordinate for every x-coordinate and since this is not the case here, f is not a function.