Cindy's chart
A scatterplot displays state-level HPV vaccination coverage among U.S. youth, comparing the percentage of females who received three doses against that of males, with each dot representing a state or local area. The chart encodes the female vaccination rate on the x-axis and the male rate on the y-axis, revealing a general positive association between the two. Built with D3 v3, the visualization uses `d3.scale.linear` for axes, SVG `circle` elements for data points, and native `title` tooltips to show exact values on hover. Data comes from the 2013 National Immunization Survey, filtered to include only entries with both male and female values.