this is a quadratic intercept calculator. use the 3 black buttons in the center of the screen between the intercepts and the variables to change a b and c use the button at the bottom of the screen to switch from subtracting and adding. press the button on the left of the screen to set all variables to 0. press spacebar to change the ammount the buttons add or subtract from a b and c. to graph the equation click the button in the top left corner you can adjust the detail and magnification using the sliders
