Least-squares line and Se June and Jim are partners in the chemistry lab. Their assignment is to...

Least-squares line and Se

June and Jim are partners in the chemistry lab. Their assignment is to determine how much copper sulfate (CuSO₄) will dissolve in water at 10, 20, 30, 40, 50, 60, and 70            C. Their lab results are shown in Table 9-12, where y is the weight in grams of copper sulfate that will dissolve in 100 grams of water at x°C. Sketch a scatter diagram, find the equation of the least-squares line, and compute S_e.

TABLE 9-12 Lab Results (x = °C, y = amount of CuSo4)
x	y
10	17
20	21
30	25
40	28
50	33
60	40
70	49