Determining the height of an adult living in the US in the year 2000 using the graph equation gave the most accurate estimate because the scale of the x-axis, the scale of the y-axis, the slope of the equation, and the y-intercept of the equation affected the accuracy of estimation from the graph equation.
Using a properly labeled and scaled graph ensures that values can be read accurately, while the slope indicates the rate of change. The y-intercept provides a baseline reference point, which, in turn, helps in establishing a reliable estimate for the height based on the data available for that time period. Together, these elements contribute significantly to how accurately we can estimate heights from the graph.