Answer:
The second graph represents the equation f(x) = 4x - 2.
Explanation:
Given that the equation for a linear function is f(x) = mx+b, m being the slope and b the y intercept,
The y-intercept (-2) matches the same one from graph 1 and 2.
However, With the slope being 4, only the 2nd graph works, since graph one's slope is 1/4.
The answer is: The second graph represents the equation f(x) = 4x - 2.