Google Charts Basic Trendlines

Google Charts Basic Trendlines

<html>
   <head>
      <title>Google Charts Tutorial</title>
      <script type = "text/javascript" src = "https://www.gstatic.com/charts/loader.js">
      </script>
      <script type = "text/javascript" src = "https://www.google.com/jsapi">
      </script>
      <script type = "text/javascript">
         google.charts.load('current', {packages: ['corechart']});     
      </script>
   </head>

   <body>
      <div id = "container" style = "width: 550px; height: 400px; margin: 0 auto">
      </div>
      <script language = "JavaScript">
         function drawChart() {
            // Define the chart to be drawn.
            var data = new google.visualization.DataTable();
            data.addColumn('number', 'Age');
            data.addColumn('number', 'Weight');
            data.addRows([
               [ 8,      12],
               [ 4,      5.5],
               [ 11,     14],
               [ 4,      5],
               [ 3,      3.5],
               [ 6.5,    7]
            ]);

            // Set chart options
            var options = {
               'title':'Age vs Weight',
               'width':550,
               'height':400,
               'legend': 'none',
               trendlines: { 0: {} }    // Draw a trendline for data series 0.
            };

            // Instantiate and draw the chart.
            var chart = new google.visualization.ScatterChart(document.getElementById('container'));
            chart.draw(data, options);
         }
         google.charts.setOnLoadCallback(drawChart);
      </script>
   </body>
</html>