The graphs below display the average life expectancy for Americans according to the National
Center for Health Statistics. Which graph would you show if you wanted to convince someone that
the advances of modern medicine will soon have us living to be 150? 
Definitions:
American Indians
Indigenous peoples of the United States, including numerous tribes, each with their own distinct cultures and history.
European Americans
Individuals in the United States who trace their ancestry to Europe.
Insulin
A substance secreted by the pancreas that controls the levels of sugar in the blood by enabling glucose to be absorbed into body tissues.
Cortisol
A steroid hormone produced by the adrenal glands, often referred to as the "stress hormone" because its levels increase in response to stress.
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