The graph of y=f(x) is shown below. Graph y=2f(x)

Question

The graph of y=f(x) is shown below. Graph y=2f(x)

 

I dont know how to add pictures 

Answer 1

every point on the original graph is an ordered pair (x,y) where y = f(x).  For the second graph, the y values will be doubled in each case, for the original x values. So this is a VERTICAL STRETCH.