Question: The attachment was taken from a graph that appeared in the article "Reactions on Painted Steel Under the Influence of Sodium Chloride, and Combinations Thereof" (Ind. Engr. Chem. Prod. Res. Dev. 1985: 375-378). The independent variable is the rate of Deposition of SO2 (mg/m ² /d) And the dependent variable is the weight loss of the steel (g / m ² ).

1. Construct a dot plot (scatter plot). And based on it, answer this Next questions
2. Does simple linear regression seem reasonable in this situation?
3. Calculate the estimated regression line equation.
4. Construct the adjusted regression graph
5. Calculate the Pearson correlation coefficient (r) and determine if it is a correlation Positive or negative.
6. Determine the coefficient of determination (R).
7. What percentage of the observed variation in steel weight loss can be attributed to the model relation in combination with the variation of the deposition rate?
8. Using the regression equation estimate the values of X for: 25, 70 and 100 mg / m ² / d, respectively

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