Plot the graph of:
y = x^2 - 2x = x*(x-2) ...(1)
If y = 0 => x = 0 and x =2
Hence, the given curve intersects x-axis at x = 0 and x = 2.
Differentiate Eqn (1) with respect to x:
dy/dx = 2*x -2 ...
This shows how to graph a given parabolic equation.