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...
Looking at the bureaucratic appointment system of post-Tsai Ing-wen- —— "Tsai Lai political struggle...
How old is the earth? Let’s not create straw men then set them aflame. No one with any understanding...
If you have no insurance and you need help look up the health department there's one on East Atlanti...
There's something very peculiar about the atmosphere surrounding Titan, Saturn's largest moon: rathe...
If you suffer from excessive anger, the #1 thing I would recommend trying, which most people don’t r...
Russia is a closed, autocratic regime controlled by a strongman and the wealthy few. Any form of dis...
There's a bunch of reasons that i can think of right now. :not enough support :friends/family influe...
A fitness trend known as Japanese walking is capturing attention online, promising major health bene...
Treasury yields dropped Wednesday after ADP said payroll growth was the weakest in more than two yea...
Henry Runder, you must be thinking about Trump's women when you say prostitute. Wasn't Melania a por...
… The finer points are lost on my users. Don’t kill yourself is don’t drink coffee and wear Nathan’s...