↑↑↑   Simple Graph of 3 Functions (±20)   ↑↑↑ CANVAS NOT SUPPORTED IN THIS BROWSER! var F1 = function(X) { let y = 0, x = X * 1.0 ; let r = 8.0 ; y = Math.sqrt( r*r - x*x ) ; return y * 1.0 ; } ; var F2 = function(X) { let y = 0, x = X * 1.0 ; let a = 1/2, b = 0, c = -8; y = a * x*x + b * x + c; return y * 1.0 ; } ; var F3 = function(X) { let y = 0, x = X * 1.0 ; y = - F1(x) ; return y * 1.0 ; } ;