43. The peak discharge of a river is an important parameter for many engineering design problems. Estimates of this parameter can be obtained by relating it to the watershed area (x1) and watershed slope (x2). Estimate the relationship based on the following data.

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x1 x2 (m) (ft/ft) Peak Discharge (ft/sec) 36 .005 50 37 .040 40 45 .004 45 87 .002 110 450 .004 490 550 .001 400 1,200 .002 650 4,000 .0005 1,550