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...
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MeTV Toons, the soon-to-be-launched (at the time of this writing, May 2024) OTA classic animation br...
There are no five star Michelin restaurants anywhere in the world, as the highest rating is three st...
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Do not invoke the name of Jesus, do not invoke spirits to enter the body, do not believe anything Ch...
Sweating on your face after eating spicy food is often due to gustatory sweating, a condition where...
Focus, on you. They're gone. There's no more pain no more suffering no more heartaches. You have to...
Nice Guys ≠ nice guys Bad Boys ≠ bad boys. The greatest irony is that the Bad Boys are usually the a...