Least-Squares Regression Line. Conic Sections: Parabola and Focus. example
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Step 1: For each (x,y) point calculate x 2 and xy. Step 2: Sum all x, y, x 2 and xy, which gives us Σx, Σy, Σx 2 and Σxy (Σ means sum up) Step 3: Calculate Slope m: m = N Σ(xy) − Σx Σy N Σ(x 2) − (Σx) 2 (N is the number of points.) Step 4:
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We want to estimate the regression line parameters a and b. In the standard least square method, we can work out a few auxiliary values which
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