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3 years ago

8

Grover decides to swim downstream to search for new bones. He can swim 30 miles down stream in 3 hours. To return home swimming

against the current, takes Grover 5 hours. What is Grover's swimming speed of the stream's current.

1 answer:

nlexa [21]3 years ago

6 0

You need to divide 30 miles by 5 hours,so your average speed is going to be 6 miles an hour

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Answer:

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Step-by-step explanation:

Applying the estimated Regression Equation

y = b1X1 + b2X2 + a

b1 = ((SPX1Y)*(SSX2)-(SPX1X2)*(SPX2Y)) / ((SSX1)*(SSX2)-(SPX1X2)*(SPX1X2)) = 596494.5/635355.88 = 0.93884

b2 = ((SPX2Y)*(SSX1)-(SPX1X2)*(SPX1Y)) / ((SSX1)*(SSX2)-(SPX1X2)*(SPX1X2)) = 196481.5/635355.88 = 0.30925

a = MY - b1MX1 - b2MX2 = 149.25 - (0.94*61.31) - (0.31*193.88) = 31.73252

y = 0.939X1 + 0.309X2 + 31.733

For x1 ( age ) =39, and x2(weight) =143

y = (0.93884*39) + (0.30925*143) + 31.73252= 112.569

where

Sum of X1 = 981

Sum of X2 = 3102

Sum of Y = 2388

Mean X1 = 61.3125

Mean X2 = 193.875

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attached is the Tabular calculation of the required values needed for estimated regression equation

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This question has two parts. First, answer Part A. Then, answer Part B.

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Step-by-step explanation:

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