Question

Will someone please help me?;
Which of the following does NOT represent a function?

Answer 1

any options ?

Answer 2

Option A is not a function for it relates 5 with 2 values in co domain.

Answer 3

i guess the following is not function because the 2 value in the domain corresponds to two different set of values means 3 has many images in range set .which violates function defination.

Answer 4

second set of values does not represent a function

when x=2 y=1 also when x=2 y=5 .

Answer 5

i confuse between A and B

Answer 6

remember for one value of x we should have unique value of y . but for same value of y we can have multiple values of x
for example
x =2 6 8 6
y= 5 3 2 1
is not a function !
but
x=3 4 7 8
y=2 5 2 3 is a function .

so in general there should be no repetition in the values of x but y values can repeat .

Answer 7

oh okayyy i see how that makes sense now! thanks alot! :)

Answer 8

umm actually if y=sqrt root(x)+a there gonna be repetition in x val
for example when x=5 y=sqrt(x)+5 y=10, 0 that means
x= 5 5
y= 0 10

or am i wrong