the letter "k" in the g(x) function represents the y-incercept. We know that "k" is the y-incercept because the function g(x) = f(x) +k. which models the y=mx+b slope-intercept format. so, in this case k=2 because that is where g(x) intercepts the y-axis. so, the answer is k=2. Hope this helped!