V3: Bar and Line mix

HTML

<script src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="http://www.amcharts.com/lib/3/serial.js"></script>
<script src="http://www.amcharts.com/lib/3/themes/light.js"></script>
<script src="http://www.amcharts.com/lib/3/themes/dark.js"></script>
<div id="chartdiv" style="background-color:#ffffff; width: 100%; height: 362px;"></div>

JavaScript

AmCharts.makeChart("chartdiv", {
    type: "serial",
    theme: "dark",
    dataProvider: [{
        "year": 2005,
            "income": 23.5,
            "expenses": 18.1
    }, {
        "year": 2006,
            "income": 26.2,
            "expenses": 22.8
    }, {
        "year": 2007,
            "income": 30.1,
            "expenses": 23.9
    }, {
        "year": 2008,
            "income": 29.5,
            "expenses": 25.1
    }, {
        "year": 2009,
            "income": 24.6,
            "expenses": 25
    }],
    categoryField: "year",
    startDuration: 1,
    rotate: true,

    categoryAxis: {
        gridPosition: "start"
    },
    valueAxes: [{
        position: "top",
        title: "Million USD",
        minorGridEnabled: true
    }],
    graphs: [{
        type: "column",
        title: "Income",
        valueField: "income",
        fillAlphas: 1,
        balloonText: "<span style='font-size:13px;'>[[title]] in [[category]]:<b>[[value]]</b></span>"
    }, {
        type: "line",
        title: "Expenses",
        valueField: "expenses",
        lineThickness: 2,
        bullet: "round",
        balloonText: "<span style='font-size:13px;'>[[title]] in [[category]]:<b>[[value]]</b></span>"
    }],
    legend: {
        useGraphSettings: true
    }

});