The following data represents an engineer's salary raise history. Years working 0 2 6 10 Annual salary 75,000 82,000 97,000 105,000 1. Using this data, determine a prediction line using the least squares method. You may check your answer with your calculator, however to receive full credit, you must perform the calculations using the normal equations below. If you do not show your work, even if you have the correct answer, you will only receive half credit. 2. If you tried to switch companies with 8 years of experience, using the prediction equation, how much in salary would you expect to be receiving? Normal equations Sum y =a * n + b * sum x Sum xy = a* sum x + b * sum x 2