Questions like this are always confusing.
I think this is what it means.
** Sorry Chris, I only just realized that you had already given the same graph.
here is the graph of y=tan x
Can you see that the gradient (which is the derivative) is always positive?
As the graph approaches the asymptotes, the gradient becomes infinitely large.
In the middle of each section, the gradient appears to be about 1. It is steeper than that everywhere else.
This looks the same as one of your graphs.
Which one is that?