Question

Which of the following is not a function?{(0,0), (3,16), (12,69) }{(-1,-3), (0, -2), (2,0) }{(3, 1)}{(3,3), (1,2), (5,4)}{(1, 1), (1, 2), (2, 1), (3, 4)}I am not sure if my answer is right

Answer 1

Answer;

$E$

Explanation:

For a relation to be a function, no single domain value (x-value) will have two range values (y-values).

However, we can have one range value (y-value) having two domain values (x-values)

Now, with this in mind, let us check through the given options.

Let us take a look at the last option;

A single domain value 1 has two range values in (1,1) and (1,2)

This does not follows the rule, and we can assume that the given relation is not a function