A Calculate b1 and b0 What is the sample regression equation

A. Calculate b₁ and b₀. What is the sample regression equation? (Negative values should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places and final answers to 2 decimal places.)

B. Find the predicted value for y if x equals 25, 104 and 226. (Round your answers to 2 decimal places.)

Solution

A.

You can use the =SLOPE(y values, x values) and =INTERCEPT(y values, x values) to get the slope and intercept using Excel.

Using technology, we get

b0 = -56
b1 = 7

Thus, the regression equation is

y = -56 + 7x [ANSWER]

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B.

Plugging in values of x to get y,

at x = 25, y = 119.

at x = 105, y = 679

at x = 226, y = 1526 [ANSWERS]