Tag Archives: parameter

The standard form of a quadratic is $y=ax^2+bx+c$.  Most students understand the effects of a and c on the graph of the parabola, but what does b do?  I hinted at this problem earlier, but just created and uploaded a GeoGebraTube Web document to model the problem.
For a standard form quadratic, $y=a*x^2+b*x+c$, you probably know how the values of a and c change the graph of the parabola, but what does b do?  Be specific and prove your claim.