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...
Ah, society and its norms—always looming, always judging, isn't it? Let me take you back to an incid...
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The White House says the ban will "protect Americans from dangerous foreign actors".
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As Google faces its biggest challenge yet, here's how you can turn uncertainty into your next big wi...