The data pairs $(x, y)$ represent the average annual tuition $y$ (in dollars) for public colleges in the United States $x$ years after 2005. Use the linear regression feature on a graphing calculator to find an equation of the line of best fit. Round the value of the slope and the value of the y-intercept to the nearest hundredth. Then estimate the average annual tuition in 2020 to the nearest hundred dollars.