Which of the following does not represent a function?

x 2 3 5 8
y 7 11 15 20

x −4 −2 0 5
y 3 −1 −1 10

x −5 −3 −2 0
y −32 −2 −8 −3

x −3 −3 6 2
y 0 1 5 4

Question

Which of the following does not represent a function? 

 x 2 3 5 8 
 y 7 11 15 20 

 x −4 −2 0 5 
 y 3 −1 −1 10 

 x −5 −3 −2 0 
 y −32 −2 −8 −3 

 x −3 −3 6 2 
 y 0 1 5 4

allank · Answer

Hint: For a function, plugging in one value of x should give  only one value of y.

cwrw238 · Answer

its the last option  because
-3 maps to 0 and also tp 1
making it a one-to-many relation which is not a function

a function is either on-to-one or many -to one