at what x - value does the graph jump? in other words, where is it discontinuous?\n0\n4\n6\n8\ndone

Explanation:

Step1: Observe the graph

Check for breaks or jumps.

Step2: Identify the x - value

At x = 4, there is a jump as the graph has an open - circle above x = 4 on the first line segment and a closed - circle at a different y - value for the second line segment starting at x = 4.

Answer:

4