Actually no part of the equation refers to slope. You would need to take the derivative since the slope of a quadratic is constantly changing but the derivative will give you a function to calculate the slope at any given point.
I have so much respect for people who make dictionaries. Someones job was to literally describe every word in the English language put it in a book. Like if I had to do that itd be so sarcastic rude like sky: that blue fucking thing over your head dumbass