Question

Which one of the following relations represents a function?

Answer 1

@ParthKohli

Answer 2

@dpaInc @.Sam. @cwrw238 @phi @A.Avinash_Goutham

Answer 3

a function does not allow the same x with a different y
so (1,2) and (1,3) are not allowed (same x=1 but 2 different y values)

Answer 4

one quick way to test some of these is try y= +1 and y=-1 and see if x is the same. if you get the same x, then you do not have a function.

Answer 5

i think its a

Answer 6

@phi

Answer 7

can you help me @Neemo

Answer 8

yeaah ! a isn't a function ! that's correct !

Answer 9

if by (a) you mean
y^2 = x^2

notice that (1,1) and (1,-1) both work. Try it. so it is not a function

Answer 10

You are trying to find the one that is a function not the one that isn't

Answer 11

so a is definitely not the answer