Hyperbola II

The underlying JavaScript code

JXG.Options.label.autoPosition = true;
JXG.Options.text.fontSize = 16;
JXG.Options.line.strokeWidth = 0.8;

var board = JXG.JSXGraph.initBoard('jxgbox', { boundingbox: [-5, 5, 5, -5], axis: false, showClearTraces: true});

var h = board.create('functiongraph', ['1/x']);
var l1 = board.create('line', [0, 0, 1], {dash: 1});