The accompanying data was read from a graph. The Independent variable is SO2 dep

Question

The accompanying data was read from a graph. The Independent variable is SO2 deposition rate (mg/m^2/d) and the dependent variable is steel weight loss (g/m^2). Calculate the equation of the estimated regression line. (Round all numerical values to two decimal places.) What is the correlation coefficient r? (Round your answer to three decimal places.) Because the largest x value in the sample greatly exceeds the others, this observation may have been very influential in determining the equation of the line. Delete this observation and recalculate the equation. (Round all numerical values to two decimal places.)

Explanation / Answer

b)

Using technology, we get              
              
slope =    7.802001193          
intercept =    188.3422791          
              
Thus, the regression line is              
              
y =    7.802001193   x   +   188.3422791 [ANSWER]

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b)

Also, getting the correlation,  
  
r =    0.996933929 [ANSWER]

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c)

Using technology, we get              
              
slope =    8.264798915          
intercept =    175.0971532          
              
Thus, the regression line is              
              
y* =    8.264798915   x   +   175.0971532 [ANSWER]

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