When laboratory rats are exposed to asbestos fibers, some of them develop lung tumors. The table lists the results of several experiments by different scientists. Asbestos Percent of mice Asbestos Percent of mice exposure that develop exposure (fibers/mL) lung tumors that develop (fibers/mL) lung tumors 50 1600 41 400 5 1800 36 500 6 2000 39 900 3000 49 1100 27 (a) Find the regression line for the data. (Use x for asbestos exposure in fibers/mL and y for percent of mice with tumors. Round your values to four decimal place