. Cubic Bezier Curves
We can find a cubic curve passing through 4 given points using the same process that we just did for the quadratic curve above.
For example, if I use the same 3 points P(1,2), Q(3,5) and R(5,4) as I did for the above example and then add a 4th point S(6,10), to find the cubic curve passing through these 4 points I need to set up a set of 4 equations in 4 unknowns, using the general cubic: