How to change the x-axis line from top to bottom in d3.js

@edmond_brakus 

To change the x-axis line from top to bottom in d3.js, you need to modify the orientation of the axis. By default, the x-axis line is displayed at the top of the chart. To move it to the bottom, you can use the following steps:

1. Define the x-axis scale:

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var xScale = d3.scaleLinear()
  .domain([0, 100])
  .range([0, width]);

1. Define the x-axis:

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var xAxis = d3.axisBottom(xScale);

1. Append the x-axis to the chart:

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svg.append("g")
  .attr("transform", "translate(0," + height + ")")
  .call(xAxis);

By setting the transform attribute with "translate(0," + height + ")", you are moving the x-axis line to the bottom of the chart. This will display the x-axis line at the bottom instead of the top.