The document describes a student project using linear, quadratic, and logarithmic equations to predict future US population growth based on historical data from 1850 to 2010. The student first used a linear equation with two data points to predict a 2061 population. Then a quadratic equation was used with three points to model curved growth. Finally, a logarithmic equation was applied to see if it produced a different projected population total. Graphs and work were shown for each equation type.