Post 1
The equation y = cx2 has been solved by “manual fitting” of the figures. However, this is not the appropriate way, since it is not universal, and it does not suit for all the problems. Instead, x and y values (x = -2, y = 6 and x = 2, y = 6) should be applied to the equation. For example, 6 = 22∙ c; 4 ∙ c = 6, subtracting by 4, c = 1.5. This method is universal and can be used for any other complicated case to find the equation. Then, the focus can be determined. If the algebraic method to find the parabola equation ...