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...
Generally, an hourglass figure is seen as sexually attractive to men and suggests high fertility. Bu...
Appendix cancer is a condition that, until recently, was so rare that most people never gave it a se...
Not a Trump supporter, but I have intensely studied him for years, as he is a lightning rod for dark...
1995-0215, Four Ranger Students Die of Hypothermia. Timeline: 1994-1215, a Monday, Ft Benning, GA, 3...
Nearly every prediction about climate change by the alarmist activists has been wrong. Sadly, most o...
I had a very happy life before 2022-2023 with my mom, dad, friends, relatives. I was happy in my own...
As usual, part review, part recap. I include stuff in here that happens later in the story, so if yo...
She might have been recuperating in the “Places of Rest” in the Afterlife - that’s why you never had...
You can start with this - From “Men Explain Religion to Me.” 18- The Bible Explains Family The first...
A girl in our neighborhood had started to prepare for a competitive examand she got selected in a go...
That time I accidentally flooded my bathroom and closet because I went for a run and forgot the tub...