Response:
The graph in question is linked to g(x) = -2x, though it is not provided.
Detailed explanation:
A reflection across the y-axis changes the sign of the x-coordinate for every point. To derive the new function, we substitute x with -x:
g(x) = f(-x) = 2(-x) = -2x
This leads us to g(x) = -2x.
The solution is found in the image attached below.