This visualization shows the trade-off between costs and health outcomes in an "Efficient Frontier" scatter plot, with time on the x-axis and QALYs on the y-axis. The chart uses React with D3 v5 scales and axes, rendering an SVG path via d3.line with curveNatural to connect the data points. Data comes from the Data Canvas Sense Your City dataset, specifically weekly temperature readings from San Francisco.