Puoi aprire il codice e modificare la funzione: vedi l'Help
You can open the Code and modify the function: see the Help
HELP

// --- f blue, g green, h red, k orange ----

function f(x) { y = x*x+x+Math.abs(x)-1; return y }
function g(x) { y = 1/0; return y }
function h(x) { y = 1/0; return y }
function k(x) { y = 1/0; return y }
// function h(x) { y = x*x+x+x-1; return y }
// function k(x) { y = x*x+x-x-1; return y }

aX = -4; bX = 4; aY = -2; bY = 15
Dx = 1/2; Dy = 1
// aX = -1.3; bX = 0.5; aY = -1.5; bY = 1.5
// Dx = 1/10; Dy = 1/2