Answer: Reflection over the y-axis.
Step-by-step explanation:
Suppose that we start with the function f(x).
And now we have te transformation g(x) = f(-x)
Notice that in the first function, the value f(3) is at x = 3.
And in the second equation, the value f(3) is when:
g(-3) = f(- (-3)) = f(3)
is at x = -3
This happens for all values of x, then we had a reflection over the y-axis.
The correct option is the third one.
