Answer: Continuous.
- A Discontinuous
- B Continuous
- C Periodic
- D Unbounded
Correct answer: B. Continuous
Explanation: Differentiability implies continuity at that point, though the converse is not true.
f(x)=|x| is perfectly continuous at x=0 (no break, no jump), but the curve has a sharp corner there: approaching from the left gives slope -1 and from the right gives slope +1 - since these one-sided derivatives disagree, the function is not differentiable at that point.
Concept context
When a function has no breaks (continuity) and when it has a well-defined slope (differentiability), plus rules for differentiating implicit, inverse trig, exponential, log, and parametric functions.