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.

(a) Find the regression line for the data.

(b) Make a scatter plot and graph the regression line. Does the regression line appear to be a suitable model for the data?

(c) What does the y-intercept of the regression line represent?

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Asbestos Percent of mice Asbestos Percent of mice that develop lung tumors that develop lung tumors exposure exposure (fibers/mL) (fibers/mL) 50 1600 42 400 1800 37 500 2000 38 900 10 3000 50 1100 26