Question

Use a graph to determine whether the given function is continuous on its domain. HINT [See Example 1.]
f(x) =
x + 7 if x < 0
2x − 5 if x ≥ 0
1
continuous discontinuous

If it is not continuous on its domain, list the points of discontinuity. (If there is no such point, enter NONE.)
x = 2

Answer 1

This is very simple and quick to graph.

Have you tried to graph these?

What don't you understand?

Answer 2

In google type: "function graphs online"

When you see list buf results click on:

rechneronline.de/function-graphs/

When page be open in blue rectacangle
type: x+7

in grey rectacangle click: 2*x-5

In Display properties set:
Range x-axis -20 to 20
and
Range y-axis -20 to 20

Then click option Draw

Answer 3

Continuous