FusionCharts - Vertical Zero Plane in charts with numeric x-axis

Showing only specific data values of a chart

HTML

<script src="https://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<script src="https://static.fusioncharts.com/code/latest/fusioncharts.zoomscatter.js"></script>
<div id="chartContainer">FusionCharts will render here</div>

JavaScript

FusionCharts.ready(function() {
  var selectivityChart = new FusionCharts({
    type: 'zoomscatter',
    renderAt: 'chartContainer',
    width: 600,
    height: 400,
    dataFormat: 'json',
    dataSource: {
      "chart": {
        "caption": "Selectivity and Returns of majors",
        "subcaption": "in higher education",
        "yaxisname": "20 year average-annual return on degree, %",
        "xaxisname": "Admission rate, %",
        "anchorBgColor": "#FF0000",
        "yaxismaxvalue": "25",
        "showzeroplane": "0",
        "yaxisminvalue": "-15",
        "anchorradius": "2",
        "plotTooltext": "<div id='valueDiv'><b>$seriesName</b>, Admission rate % : <b>$xDataValue</b>, Return % : <b>$yDataValue</b></div>",
        "showRegressionLine": "1"
      },
      "dataset": [{
        "seriesname": "Major A",
        "anchorBgColor": "#addef7",
        "anchorBordercolor": "#17a1e8",
        "anchorBorderThickness": "1",
        "data": [{
          "y": 14.42,
          "x": 18.88
        }]
      }]
    }
  });
  selectivityChart.render();
});