The enrollment at East Valley High School over a six-year period is displayed in the scatterplot. Student Enrollment at East Valley High School On a graph, the x-axis is labeled year and the y-axis is labeled students. Points (2009, 1,330) and (2013, 1,492) are plotted. Which is the equation of the line of best-fit for this scatterplot? y = negative StartFraction 81 Over 2 EndFraction x + StartFraction 165,389 Over 2 EndFraction y = negative StartFraction 2 Over 81 EndFraction x + StartFraction 111,748 Over 81 EndFraction y = StartFraction 2 Over 81 EndFraction x + StartFraction 103,712 Over 81 EndFraction y = StartFraction 81 Over 2 EndFraction x minus StartFraction 160,069 Over 2 EndFraction