new Chartist.Line('.ct-chart', {
  series: [[
    {x: 1, y: 100},
    {x: 2, y: 50},
    {x: 3, y: 25},
    {x: 5, y: 12.5},
    {x: 8, y: 6.25}
  ]]
}, {
  axisX: {
    type: Chartist.AutoScaleAxis,
    onlyInteger: true
  }
});