Scatter Plot Graph with Trendlines

The scatter plot graph above shows the year and population of Alabama and Alaska. Each has an trendline corresponding with the state, which gives the ability to plug it into an equation (y = 2x + 3) in order to find the population in a given year.

Trendlines can be switched to a few different options, but for this lab we used linear and polynomial.  Linear trendlines work best when the data is straight.  Polynomial trendlines work best when the data curves. In this particular graph, linear trendlines work best.