Adjust the focus coordinates and the equation of the directrix to make the blue parabola match the orange parabola.
All points on the blue parabola are equidistant from the focus and the directrix. How does changing the numbers affect the shape of the parabola?
graphInit({
range: 10,
scale: 20,
tickStep: 1,
axisArrows: "<->"
});
// Plot the orange parabola
style({
stroke: "#FFA500",
fill: "none",
clipRect:[ [-10, -10], [20, 20] ],
arrows: null
});
plot( new Parabola( A, X1, Y1 ).graphieFunction, [-10, 10]);
style({
stroke: "#6495ED",
strokeWidth: 3,
fill: "none",
clipRect:[ [-10, -10], [20, 20] ],
arrows: null
});
graph.currParabola = new Parabola( 1, 0, 0 );
graph.currParabola.plot( true );