Considering the scatterplot above i What value of the linear

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.)

(ii) What value does the model predict for the concentration of carbon dioxide in 2020? (Express your answer in parts per million rounded correctly to the nearest hundredth!) parts per million

(iii) 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

Solution

R = srqt (0.994) = 0.9969

Y = 1.6178x -2864.6

Y = 1.6178*2020 - 2864.6 = 403.356

c)

Y = 1.6178*1991 - 2864.6 = 356.4398