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Heart Disease, Cancer and AIDS : Plotting Graphs and Defining Functions

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I have found the number of deaths in the United States due to each medical condition in each of the following years.

1985 1990 1995 2002

Heart Disease 390,000 720,000 850,000 960,000

Cancer 200,00 505,000 547,000 555,000

AIDS 2,500 7,500 12,500 17,500

How do I plot the data on a graph in a rectangular coordinate system if I do not have excel to determine from the two points. x is my years and y is my deaths to predict the number of deaths in 2005 by using a smooth line to connect my data points for each disease graph and to also find the y intercept? Can you show me? HELP!!

Can they be classified as functions? If so could you please explain?

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Solution Summary

Graphs relating to Heart Disease, Cancer and AIDS and functions are defined. The solution is detailed and well presented. The response received a rating of "5" from the student who originally posted the question.