x1 = 50, y1 = 5 x1y1 = 250
x2 = 40, y2 = 6 x2y2 = 240
x3 = 30, y3 = 7 x3y3 = 210
x4 = 20, y4 = 8 x4y4 = 160
Therefore, x and y are not in inverse proportions.
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