How can we mathematically differentiate between a straight line and a curve?

[Momi]

Homework Statement

How to prove line is a curve?

The Attempt at a Solution

I only know that line is a straight curve but how it can be proved?no idea!
Immediate help would be appreciated...
regards,
Momi

 

[robphy]

Can you provide more context of the question and your "definitions" of "line" and "curve"?
Otherwise, the discussion isn't going to very precise... and you won't end up with a proof.

 

[Pellefant]

O didn't know that u could call a line for a curve, even a line segment would be a curve so it don't need to be continuous ..

http://en.wikipedia.org/wiki/Curve

 

[Gib Z]

I'm sure what you mean is that a curve and a straight line are different to you because, well, a straight line goes straight and a curve line changes directions. Put this into mathematical language!