Question

Which functions are symmetric with respect to the y-axis? Check all that apply.

Answer 1

When a function is symmetric with respect to the y axis, it means that the function is even: $f(-x)=f(x),\forall x\in\mathbb{R}$
We can check easily that the following function verify the above property:
$f(x)=\vert x\vert\\f(x)=\vert x\vert+3\\f(x)=\vert x\vert+6$

Answer 2

The answer is 1,2,4                            hope this helped.