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...
I can think of two major things, one of which was Tony Soprano’s fault and the other wasn’t entirely...
A guy friend and I usually hung out together in the evening after work. I complained that my back an...
A walking disaster, but worth the loyalty and the wait. More like “ war”, living a nightmare just to...
Wow, how can a person pick just one? I have twenty that I consider mean, that they don't, so here go...
The earth was known to be a globe more than 2000 years before NASA existed so they'd have had a lot...
That’s rich. Wasn’t it Obama whose State of the Union address was interrupted by a Senator shouting...
Journalist :-- Which religion do you belong to? Chandrashekhar:-- I am a human being and I believe i...
What are the best examples of reverse psychology? Someone might use reverse psychology to abuse you....
He would be a boring 3rd rate pansy preach like most “superheroes”. Homelander was not made for be...
I will answer this question showing my signs of autism I had as a child: SIGNS I HAD AS A BABY (0–2...
Well I wish it wouldn’t have come to this but today was some accident where a poor 17 year old got h...