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...
A new study reveals that poor sleep quality is linked to increased jealousy in people with high rela...
Spiritual leader? trump? Not in a million years. Trump was found liable for sexual assault and was o...
Your 2001 Mustang's 4.6L V8 uses old tech from the early 2000s: port fuel stuff, simple ECU set up, ...
The rate increases affect customers of PSE&G, JCP&L, Rockland Electric and Atlantic City Electric.
It was one of the most popular shows on television, wasn’t it? Nobody bothers to hate obscure shows....
Stunning photos reveal the Milky Way like never before—captured from Earth’s darkest places and even...
After using Pocket daily for a decade, I finally found a self-hosted replacement that brings back in...
We tried seven store-bought chocolate ice creams to find the richest and creamiest pick—and one was...
Ahh, the obsession with the “iklauta”! Should I marry a girl with no siblings? Hawwww, no brother? N...
The main cast of The Office, US version, season 3, except for the black-haired woman at the back on...
These 6 things: > Belief in democracy — Republicans seem to believe that any election will have two...