A scatter plot of weather and flight-delay data for Logan Airport from 2016-2018 visualizes the relationship between date, maximum temperature (TMAX), and average flight departure delay (DEP_DELAY). Interactive color legend circles for each year filter and highlight corresponding points when hovered, while unselected points fade to 20% opacity. The visualization uses React with D3 scales (`d3.scaleTime`, `d3.scaleLinear`, `d3.scaleOrdinal`) for axes, color encoding, and point sizing, rendering SVG circles with `circle` elements and tooltips via SVG `<title>` elements. Data is loaded as CSV from a GitHub gist.