Cubic function


Varying  a

The animation shows how the graph of   y = ax3 + bx2 + cx + d   changes as  a  varies.


Varying  b

The animation shows how the graph of   y = ax3 + bx2 + cx + d   changes as  b  varies.

What is the locus of the two turning points?


Varying  c

The animation shows how the graph of   y = ax3 + bx2 + cx + d   changes as  c  varies.