function lineChart() {
  var margin = {top: 25, right: 25, bottom: 25, left: 25},
  width = 960 - margin.left - margin.right,
  height = 500 - margin.top - margin.bottom,
  xValue = function(d) { return d.x; },
  yValue = function(d) { return d.y; },
  xScale = d3.scale.linear(),
  yScale = d3.scale.linear(),
  xAxis = d3.svg.axis().scale(xScale).orient("bottom").tickSize(6, 0),
  yAxis = d3.svg.axis().scale(yScale).orient("left"),
  line = d3.svg.line()
    .x(function(d){return xScale(xValue(d))})
    .y(function(d){return yScale(yValue(d))});

  function chart(selection) {
    selection.each(function(data) {

      // Update the x-scale.
      xScale
          .domain(d3.extent(data, xValue))
          .range([0, width]);

      // Update the y-scale.
      yScale
          .domain([0, d3.max(data, yValue)])
          .range([height, 0]);

      // Enter svg
      var svg = d3.select(this).selectAll("svg").data([data]),
      gEnter = svg.enter().append("svg")	
	.append("g")
	.classed("plot",true);

      // Enter Axes
      gEnter.append("g")
	.attr("class", "x axis")
	.attr("transform", "translate(0," + height + ")")
	.call(xAxis);

      gEnter.append("g")
	.attr("class", "y axis")
	.call(yAxis)

      //Enter line
      gEnter.append("path")
	.datum(data)
	.classed("line",true)

      // Update the outer dimensions.
      svg.attr("width", width + margin.left + margin.right)
	.attr("height", height + margin.top + margin.bottom);

      // Update the inner dimensions.
      var g = svg.select("g.plot")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")");                

      // Update the x-axis.
      g.select(".x.axis")
          .attr("transform", "translate(0," + yScale.range()[0] + ")")
          .call(xAxis);

      // Update the bars
      g.selectAll("path.line")
	.attr("d", line);
    });
  }

  chart.margin = function(_) {
    if (!arguments.length) return margin;
    margin = _;
    return chart;
  };

  chart.width = function(_) {
    if (!arguments.length) return width;
    width = _;
    return chart;
  };

  chart.height = function(_) {
    if (!arguments.length) return height;
    height = _;
    return chart;
  };

  chart.x = function(_) {
    if (!arguments.length) return xValue;
    xValue = _;
    return chart;
  };

  chart.y = function(_) {
    if (!arguments.length) return yValue;
    yValue = _;
    return chart;
  };

  return chart;
}