# Math Help - Quadratic Functions - Test Tomorrow

1. ## Quadratic Functions - Test Tomorrow

What do the different things in an equation mean?

Problem:
Napoleon fires a cannonball into the air. The height, h meters, of the cannonball above the horizontal ground, t seconds after launch is given by the equation.
h=-4t^2+15t+9

What does ax^2 mean? What does bx mean? What does c mean?

I'm supposed to find out what information is represented by the constant 9 in this context but I dont know what any of the information represented is?

Thank you so much.

2. A quadratic equation is usually of the form:
$ax^2 + bx + c$

3. I know!

What I'm asking is what the a value and the b value and the c value represent!

4. Originally Posted by juliak
I know!

What I'm asking is what the a value and the b value and the c value represent!
Constants called "coefficients".
It can be any number you want.