- Mr B (H. Bezuidenhout)
Understanding the first principles of differentiation. Move the slider h which represent the x-values. Make notes of the gradient of the straight line (Remember y=mx+c in other words the value in front of the x represent the gradient)
At which gradient will the line be tangent to the parabola at point (4;-1)? Does this line really exist? Playing again with your imaginary friend?