Question

Which relation is a function?








A.

{(1, 2), (1, 5), (1, –1), (1, 4)}








B.

{(8, –1), (2, –1), (3, 8), (2, 5}








C.

{(7, 12), (1, –5), (3, –10), (2, –5)}








D.

{(–3, 4), (–2, 5), (0, 9), (0, 12)}

Answer 1

the one where there is no repeated number in the first coordinate

Answer 2

In order for the set to be a function, each x value can only have one y value. So if the same x value has more than one y value, then it is not a function.

Answer 3

um id it D.?

Answer 4

nope, d is wrong you have
(0,9) and (0,12)

Answer 5

each pair of coordinates has it's own x coordinate (no x-coordinates are the same)

Answer 6

so its c.

Answer 7

right? @shamil98

Answer 8

yep good job

Answer 9

thx