Use the image to answer the question.
Two S-shaped curves are graphed on a coordinate plane. The x-axis ranges from negative 3 to 3 in increments of 1. The y-axis ranges from negative 5 to 5 in increments of 1.
The graph shows a parent function y=f(x)
(solid line) and its translated form y=f(x)+k
(dotted line) which has undergone a vertical shift. Use the graph to find the value of k.
(1 point)
k=