(c) By what percent per year were national health care costs increasing during the period from 1970 through 2010? (Use the model found in part (b). Round your answer to one decimal place.) (d) Use functional notation to express how much money was spent on health care in the year 2011. (Let e be years since 1970.) Estimate that value. (Use the model found in part (b). Round your answer to the nearest integer.) |bilion dollars

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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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(C) (D) and estimate that value. 

For this exercise, round all regression parameters to three decimal places.
The following table shows national health care costs, measured in billions of dollars.
Date
1970
1980
1990
2000
2010
Costs in
billions
75
253
714
1353
2570
(a) Plot the data. (Let t be years since 1970 and H the costs in billions of dollars.)
H
H
2500
2500
2000
2000
1500
1500
1000
1000
500
500
10
20
30
40
10
20
30
40
2500
2500
2000
2000
1500
1500
1000
1000
500
50아
10
20
30
40
10
20
30
40
(b) Find an exponential function that approximates the data for health care costs. (Let t be years since 1970 and H the costs in billions of dollars.)
O H = 993.002 x 1.002
H = 94.414 x 1.091
OH= 2560.371 x 0.872
O H = 3120.372 x 0.916
O H = 72.438 x 1.143
(c) By what percent per year were national health care costs increasing during the period from 1970 through 2010? (Use the model found in part (b). Round your answer to one decimal
place.)
%
(d) Use functional notation to express how much money was spent on health care in the year 2011. (Let t be years since 1970.)
Estimate that value. (Use the model found in part (b). Round your answer to the nearest integer.)
billion dollars
Transcribed Image Text:For this exercise, round all regression parameters to three decimal places. The following table shows national health care costs, measured in billions of dollars. Date 1970 1980 1990 2000 2010 Costs in billions 75 253 714 1353 2570 (a) Plot the data. (Let t be years since 1970 and H the costs in billions of dollars.) H H 2500 2500 2000 2000 1500 1500 1000 1000 500 500 10 20 30 40 10 20 30 40 2500 2500 2000 2000 1500 1500 1000 1000 500 50아 10 20 30 40 10 20 30 40 (b) Find an exponential function that approximates the data for health care costs. (Let t be years since 1970 and H the costs in billions of dollars.) O H = 993.002 x 1.002 H = 94.414 x 1.091 OH= 2560.371 x 0.872 O H = 3120.372 x 0.916 O H = 72.438 x 1.143 (c) By what percent per year were national health care costs increasing during the period from 1970 through 2010? (Use the model found in part (b). Round your answer to one decimal place.) % (d) Use functional notation to express how much money was spent on health care in the year 2011. (Let t be years since 1970.) Estimate that value. (Use the model found in part (b). Round your answer to the nearest integer.) billion dollars
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