In a water treatment plant, the turbidity level, and is suspected is linearly related to inches of accumulated rainfall in the month, x. The following information related to the waste water plant is available:
Turbidity Level 1 2 3 4 5 6
Inches of Water 5.6 4.6 4.5 3.7 3.2 2.7
a. Find the equation of the line using the least squares method that best describes these data.
b. Calculate the correlation coefficient.
c. Predict the value of y for a turbidity level of 3, using the equation of the line previously found.