The way I learned it, "jump discontinuity" means that there is a jump in function values that makes the gap impossible to plug with a single point. I don't think this is what you mean. Rather, at -1, the graph has a "removable discontinuity." The graph is continuous everywhere except for the "hole" at x = -1. If we "plug" the hole we would have a continuous graph at -1.

By the way, there is another place on the graph where we have a discontinuity that you didn't mention. Where is it?