Concept of Continuity
Click on the button "New Function" to generate a new graph. Whenever a brown dot (Point P) appears on the graph screen drag it to make the graph continuous.
Familiarity with kinds of discontinuities of functions is required. This GeoGebra is a hands on applet to explore different kinds of discontinuities of functions.
For more on continuity of functions check my online book
"Flipped Classroom Calculus of Single Variable"
https://versal.com/learn/vh45au/