var options = {
      title: 'Rate the Day on a Scale of 1 to 10',
      width: 500,
      height: 300,
      hAxis: {
        title:'Datetime',
      },
      vAxis: {
        title:'Rating',

        minValue: 0,

      },

    };
    let data = new google.visualization.DataTable(chart_data);
    var container =   document.getElementById('chart_div');
    chart = new google.visualization.LineChart(container);
    google.visualization.events.addListener(chart, 'ready', function () {
      container.className = null;
    });
    chart.draw(data, options);