simple line chart from dataset
This line chart displays seven monthly data points from a JSON dataset, plotting each value over time on a time-scaled x-axis and a linear y-axis. The chart incorporates interactive hover effects, highlighting a data point and displaying its value with a dashed red line. Built with D3 v4, the SVG visualization uses `d3.timeParse`, `d3.scaleTime`, `d3.scaleLinear`, `d3.line`, and `d3.json` for data loading, with animations on mouseover via `transition().duration()`.