Prep for Exam 3 Every solution must, where possible, show the method or formula being used, its evaluation by insertion of available information, and the actual reduced answer. On exam 3, the last part may be dispensed with in some cases in order that too much time need not be spent with such matters. LR (linear regression) 1. Data x y 0 0 2 0 4 12 a. In this plot of the data identify the point of averages (x, y) with a +. 1 2 3 4 x 2 4 6 8 10 12 y b. Calculate slope of regression of y on x. Hint: The math expression of slope hav- ing denominator x 2 -x 2 will simplify this particular calculation. c. Plot the regression line in the above grid, clearly indicating two points on the line, or one point and slope. ...