Line segment rs has endpoints r(-2,4)and s(-4,-1)
line segment r''s''has endpoint r''(3,-3) and s(5,2).

Which source would provide the most bias-free information about smoking and increased health risks? a) a website created by heart disease patients b) a research study conducted by the mayo clinic eliminate c) a public service message sponsored by tobacco companies d) an online question forum conducted by attorneys for cardiac specialists