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Mathematics

Grade-8

Easy

Question

Which of the following is not a function?

{(0, 1), (1, 4), (2, 5), (3, 6)}
{(0, 2), (1, 7), (4, 3), (1, 2)}
{(1, 3), (4, 2), (2, 0), (3, 4)}
{(1, 2), (2, 2), (3, 2), (4, 2)}

hint Hint:

$A space f u n c t i o n space i s space a space r e l a t i o n space w h i c h space d e s c r i b e s space t h a t space t h e r e space s h o u l d space b e space o n l y space o n e space o u t p u t space left parenthesis d o m a i n right parenthesis space f o r space e a c h space i n p u t space left parenthesis r a n g e right parenthesis$

The correct answer is: {(0, 2), (1, 7), (4, 3), (1, 2)}

{(0, 2), (1, 7), (4, 3), (1, 2)} is the correct choice
we know the definition of the function
A function is a relation which describes that there should be only one output (domain) for each input (range)
so {(0, 2), (1, 7), (4, 3), (1, 2)} because x-value(domain) 1 has two y-values pair with it.

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