Question

Complete the first table so that f(x) is a function.

Answer 1

For f(x) to be a function, the value of x should not be repeated. That is no x value can be more then once.

So the required table is

$x \ \ \ \ \ f(x) \\ -1 \ \ \ \ \ \ 2 \\ 2 \ \ \ \ \ -8 \\ 6 \ \ \ \ \ -12$

And for g(x) , not to be a function, we have to repeat x value that is

$x \ \ \ \ \ \ g(x) \\ -1 \ \ \ \ \ \ 2 \\ -1 \ \ \ \ \ \ -8 \\ 6 \ \ \ \ \ \ -2$

Answer 2

(x): -4, -8, -12
hope that helps