correlation coefficient between hydrocarbon levels and oxygen purit

#1
Based on the data in the table above:
b) Find the correlation coefficient between hydrocarbon levels and oxygen purity]
d) Provide a regression equation
e) Use the regression equation to predict:
(i). Oxygen purity when hydrocarbon level is 2
(ii). Hydrocarbon level when Oxygen purity is 80%.

my answers are:
The correlation coefficient between hydrocarbon levels and oxygen purity correlation is: 0.5347465

regression equation ∴ Y = 81.969 + 8.501X


(i). Oxygen purity when hydrocarbon level is 2
Answer:
y = 81.969 + 8.501 X
= 98.971

(ii). Hydrocarbon level when Oxygen purity is 80%.
Answer:
80 = 81.969 + 8.501 X
X = -0.2316198
 

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