The dynamicSlope option is supported when series.type is set to "funnel".

When set to true the ratio of the bases of each segment is calculated based on the ratio of currentDataItem.value/nextDataItem.value The last element is always created like a rectangle since there is no following element.

Example - set the chart series dynamicSlope field

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  series: [
    {
      type: "funnel",
      dynamicSlope: true,
      data: [
        { value: 1 },
        { value: 2 },
        { value: 3 }
      ]
    }
  ]
});
</script>