How to include data array in on chart.js line chart

I have set up the following code to get array data[]; but I don't know how to put those array in chart.js line code

$data[] = array(substr($row['CHANGE_DATE'], 5), $lastMax, $lastMin);

I want to draw a line chat with X-axis as CHANGE_DATE, Y-axis: $lastMax, $lastMin

Chart.js code

  <script>
        // line chart data
        var buyerData = {
            labels : ["January","February","March","April","May","June"],
            datasets : [
            {
                fillColor : "rgba(172,194,132,0.4)",
                strokeColor : "#ACC26D",
                pointColor : "#fff",
                pointStrokeColor : "#9DB86D",
                data : [203,156,99,251,305,247]
            }
        ]
        }
        // get line chart canvas
        var buyers = document.getElementById('buyers').getContext('2d');
        // draw line chart
        new Chart(buyers).Line(buyerData);