First ScatterPlot

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg {margin-left: 100px; margin-top: 50px;}
    .tick line {stroke: #ccc; stroke-dasharray: 5, 5;}
  </style>
</head>

<body>
  <svg></svg>
  
  <script src="birthData2011.js"></script>
  <script>
    const width = 500;
    const height = 500;
    const padding = 30;
    //d3.extent(values) return an array of min and max values
    const yScale = d3.scaleLinear()
    									.domain(d3.extent(birthData2011, d => d.lifeExpectancy))
    									.range([height - padding, padding]);
    const xScale = d3.scaleLinear()
    									.domain(d3.extent(birthData2011, d => d.births / d.population))
    									.range([padding, width - padding]);
    const colorScale = d3.scaleLinear()
    									.domain(d3.extent(birthData2011, d => d.population / d.area))
    									.range(['lightgreen', 'black']);
    const radiusScale = d3.scaleLinear()
    									.domain(d3.extent(birthData2011, d => d.births))
    									.range([2, 40]);
    
    //create Axes and Grids
    const xAxis = d3.axisBottom(xScale)
    								.tickSize(-height + 2 * padding)
    								.tickSizeOuter(0);
    const yAxis = d3.axisLeft(yScale)
    								.tickSize(-width + 2 * padding)
    								.tickSizeOuter(0);
    
    var svg = d3.select("svg")
      .attr("width", width)
      .attr("height", height);
    
    //draw Axes
    svg
      .append('g')
    	.attr("transform", `translate(0, ${height - padding})`)
      .call(xAxis);
    svg
      .append('g')
    	.attr("transform", `translate(${padding}, 0)`)
    	.call(yAxis);

svg.selectAll('circle').data(birthData2011).enter()
      .append("circle")
      .attr("cx", d => xScale(d.births / d.population))
      .attr("cy", d => yScale(d.lifeExpectancy))
      .attr("r", d => radiusScale(d.births))
    	.attr("fill", d => colorScale(d.population / d.area))
    	.attr("fill-opacity", 0.8);
    
    svg
    	.append('text')
    		.attr('x', width / 2)
    		.attr('y', height - padding)
    		.attr('dy', '1.5em')
    		.style('text-anchor', 'middle')
    		.text('Births per Capita');
    svg
    	.append('text')
    		.attr('x', width / 2)
    		.attr('y', padding)
    		.style('text-anchor', 'middle')
    		.style('font-size', '1.5em')
    		.style('font-weight', 'bold')
    		.text('Data on Births by Country in 2011');
    svg
    	.append('text')
    		.attr('transform', 'rotate(-90)')
    		.attr('x', - height / 2)
    		.attr('y', padding)
    		.attr('dy', '-1.1em')
    		.style('text-anchor', 'middle')
    		.style('font-weight', 'bold')
    		.text('Life Expectancy');

</script>
</body>

https://d3js.org/d3.v4.min.js