h(7) .....we go to "7" on the x axis and go up from there .....note that we intersect the graph at y = 5

So

h(7) = 5

So

h (h(7)) = h(5)

Now....we do the same thing

Go to "5" on the axis ....this time...we go down and intersect the graph at y = -1

So

h(h(7)) = h(5) = -1