Weework MATH 123-0 X -t Problem 4. User Settings Grades Achievements Problems Pr

Question

Weework MATH 123-0 X -t Problem 4. User Settings Grades Achievements Problems Problem 1 Problem 22 Problem 3 Problem 4 Problem 5 Type here to search ch.edu /webwork2/MATH123 00D D1-201630/Section 26 Homework/4/?effectiveuser cbrickey28lkey zdn7qMflo9MPZAnm5WUKnMe9Gu7Mwe Previous Problem List Next (6 points) Atmospheric Carbon Dioxide Concentration 1970-2012 380.00 2011, 391/63 360.00 340.00 y 16178x-2864.6 320.00 R2 0,994 300.00 975 1980 985 995 2005 2010 015 Year Considering the scatterplot above: (i) What value of the linear correlation coefficient, r, is suggested by this model? Express your answer rounded correctly to the thousandths place (i) What value does the model predict for the concentration of carbon dioxide in 1991? (Express your answer in parts per million rounded correctly to the nearest hundredth parts per million (ii) What value does the model predict for the concentration of carbon dioxide in 2016? Express your answer in parts per million rounded correctly to the nearest hundredth parts per million 2.53 PM 5/1/2017

Explanation / Answer

Solving question 1, Please repost second question seperately.

a) R^2 is given to be 0.994

to find r , we take the square root of R^2 as sqrt(0.994)=0.99699=0.997

b) Y = 1.6178x - 2864.6

for x = 1991, y = 1.6178*1991 - 2864.6 = 356.4398=356.44

c) for x = 2016, y= 1.6178*2016 - 2864.6=396.8848=396.88

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