What is one reason men have higher mortality rates than women? a. men have a predisposition for specific illnesses. b. the xx chromosome protects women from certain illnesses. c. women are more likely to seek medical care. d. women have healthier lifestyles?

The correct answer is C. women are more likely to seek medical care.
Men usually have higher mortality rates than women because they don't go to the doctor as often as women do, especially in these types of situations. Men will usually think that their illness is a temporary thing and that it will soon go away, whereas women will usually go to the doctor as soon as they notice something is wrong. 

The slope would be -3 because
6x-2y=6
-2y=6-6x
Then divide everything by -2
-2y/-2 =(6-6x)/-2
Y= -3+3x