Is there a type of function where every point has exactly one tangent line passing through it? If yes, what is this type of function called?

Eg a parabola y=x² Jesus, of course, spoke in parabolas. In those days it was like the Beatles at Sh...
Eg a parabola y=x² Jesus, of course, spoke in parabolas. In those days it was like the Beatles at Sh...
Heh….that would be a movie that I'm 98% sure none of you have ever heard of; Summer Heat. So here's...
It is a concern from the point of view of what someone will do when they are about to be arrested. T...
I’ve dated both attractive and “ugly” women. I should preface this by saying I would never have prev...
The latest regeneration poses a lot of questions.
I’ll never understand people’s obsession with discrediting some artists. Taylor Swift is an easy tar...
Yes you can and probably will, if you’re in the place I found myself. My ex left me in AZ to go back...
The Sun has approached the solar maximum of its 11 year cyclic sun flare activity. That means larger...
With closing arguments almost done, Harvey Weinstein is one closer to jury beginning deliberations i...
Officials want to avoid another collapse like Credit Suisse’s but the Swiss bank has hotly contested...
It's highly likely he was guilty. He's had 11 people accuse him of inappropriate behaviour when the...