This calculator finds the equation of parabola with vertical axis given three points on the graph of the parabola. Also Find Equation of Parabola Passing Through three Points  Step by Step Solver.
This calculator is based on solving a system of three equations in three variables
How to use the calculator
1  Enter the x and y coordinates of three points A, B and C and press "enter". Two equations are displayed: an exact one (top one) where the coefficients are in fractional forms an the second with approximated coefficients whose number of decimal number of decimal places may be chosen.
When at least two points are on a vertical line (x coordinate of A equals the x coordinate of B for example), no equation is found for a parabola with vertical axis. Numbers may be entered in decimal (example: 1.02) or fractional (example: 4/5) forms.
