In 1980, median family income was about $19,000, and in 2000 it was about $40,000, find the slope of the line passing through (1980,19000)(2000,40000)
slope = (40000 - 19000) / (2000 - 1980) [ y2 - t1 / x2 - x1 ]
= 1050
Comments
slope = (40000 - 19000) / (2000 - 1980) [ y2 - t1 / x2 - x1 ]
= 1050