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<canvas id="popChart" width="600" height="400"></canvas>
var popCanvas = document.getElementById("popChart");

Chart.defaults.global.defaultFontFamily = "Lato";
Chart.defaults.global.defaultFontSize = 18;

var popData = {
  datasets: [{
    label: ['Deer Population'],
    data: [{
      x: 100,
      y: 0,
      r: 10
    }, {
      x: 60,
      y: 30,
      r: 20
    }, {
      x: 40,
      y: 60,
      r: 25
    }, {
      x: 80,
      y: 80,
      r: 50
    }, {
      x: 20,
      y: 30,
      r: 25
    }, {
      x: 0,
      y: 100,
      r: 5
    }],
    backgroundColor: "#9966FF",
    hoverBackgroundColor: "#000000",
    hoverBorderColor: "#9966FF",
    hoverBorderWidth: 5,
    hoverRadius: 5
  }]
};

var bubbleChart = new Chart(popCanvas, {
  type: 'bubble',
  data: popData
});
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