Question

Select all input values for which f(x) =3.

Answer 1

B. x = -3

Explanation:

f(x) = y

or however the vertical axis is called.

that is just something you always have to consider.

so, for what value of x does the functional curve ever reach the result (y) value of 3 ?

imagine a horizontal line you put through y = 3.

at what points is the functional graph touching or intersecting this line ?

at exactly 1 point. and that is at x = -3.