continuity

[brenny]

when is a function continuous? someone told me it was continuous where it is differentiable but what about sharp turning point?
and what about end point with solid dots? theyre included in the domain but is the function continuous at this point?

[arthurk]

It is continuous when you can draw the graph without lifting ur pen off the paper

[THem]

I asked this question not long ago and I was told that it is not continuous at the end points ( even if they are included).
It is not differentiable at sharp points ( cusps) but it is still continuous.