This visualization displays the population growth of California, Michigan, and Texas from 1910 to 2010 using multi-line charts. Each state is represented by a colored line with a corresponding label at the right edge. Using d3.line, d3.scaleLinear, and d3.axisBottom/axisLeft, the SVG renders population trends. A mouseover tooltip reveals yearly totals and ranks states by population, with a vertical guide line using d3.mouse and d3.event. Data comes from the state-populations.json file.