math
posted by Greg .
in the quadratic formula ax©÷+bx+c, what does the "a" stand for in ax©÷?

I assume that ax© means a x^2.
a is a constant or "coefficient" that multiplies the x^2 term. 
In the quadratic formula y=ax^2+b+x
Changing c moves it up and down.
Changing b changes the slope.
Changing a alters the curvature of the parabolic element.
The general rule is, that as the absolute value of "a",becomes greater than 1, the graph becomes steep or narrow.
Changing "c" only changes the vertical position of the graph, not it's shape.