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Compute: 25 1 +22 (-1)+20*(-1)+30 1 +24 (-1)+28 1 +32 1 +35*(-1) = 25 -22 -20 +30 -24 +28 +32 -35 = (25-22=3; 3-20=-17; -17+30=13; 13-24=-11; -11+28=17; 17+32=49; 49-35=14).
y = [25, 22, 20, 30, 24, 28, 32, 35]
Better to compute systematically:
Totale prodotti recensiti : 1921
Compute: 25 1 +22 (-1)+20*(-1)+30 1 +24 (-1)+28 1 +32 1 +35*(-1) = 25 -22 -20 +30 -24 +28 +32 -35 = (25-22=3; 3-20=-17; -17+30=13; 13-24=-11; -11+28=17; 17+32=49; 49-35=14).
y = [25, 22, 20, 30, 24, 28, 32, 35]
Better to compute systematically:
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