 Above, a 1934 plaque from the Big Apple Night Club at West 135th Street and Seventh Avenue in Harlem. Discarded as trash in 2006. Now a Popeye's fast food restaurant on Google Maps.

Entry from February 14, 2017
“What do you feed a baby parabola?"/"Quadratic formula.”

A math pun on the word “formula” has been printed on several images:

Q: What do you feed a baby parabola?

“What does a baby parabola drink? Quadratic Formula” was posted on Twitter on February 16, 2013.

In elementary algebra, the quadratic formula is the solution of the quadratic equation. There are other ways to solve the quadratic equation instead of using the quadratic formula, such as factoring, completing the square, or graphing. Using the quadratic formula is often the most convenient way.
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Each of the solutions given by the quadratic formula is called a root of the quadratic equation. Geometrically, these roots represent the x values at which any parabola, explicitly given as y = ax2 + bx + c, crosses the x-axis.

Matt Simpson
‏@PhatSimpson
What does a baby parabola drink? Quadratic Formula
12:49 AM - 16 Feb 2013

Ron Wittler
‏@rwittler
what does a baby parabola have in its bottle?  Quadratic formula
12:34 PM - 11 Dec 2013

Kaitlyn
‏@kaitlyndips
WHAT DO BABY PARABOLAS DRINK???
7:45 AM - 30 May 2014

case
‏@ctabayoyong
What did the mother parabola feed the baby parabola
2:11 PM - 13 Nov 2014 from San Jose, CA

Reddit—Jokes
What do baby parabola drink?
submitted February 19, 2016 by Elasaire

Ya Bish
“What do you feed a baby parabola?”
3:08 PM - 21 Apr 2016 from San Marcos, CA