This visualization displays the relationship between math and verbal SAT scores across U.S. states in 2015, with each circle representing a state positioned by its two average scores. Circle size encodes the number of test takers, while red and blue fill colors indicate whether the state’s average math GPA falls below or above 3.5. Hovering highlights points in orange. The chart is built with D3 v7 using `d3.scaleLinear` for axes and radius, `d3.scaleOrdinal` for color, and SVG elements for rendering, with data loaded from a CSV file.