This interactive line chart displays monthly values from January to December 2016, with each data point represented as a labeled circle along a single black line. Hovering over a circle highlights it in red, enlarges its corresponding value label, and reveals a dashed vertical guide line. Built with D3 v3, the visualization uses an ordinal x-scale, a linear y-scale, and SVG elements including paths, circles, and text. Data loads from a local JSON file via `d3.json`, with dates parsed using `d3.time.format` and values formatted with `d3.format`.