The following data represent the speed of a car (in miles per hour) and its breaking...

The following data represent the speed of a car (in miles per hour) and its breaking distance (in feet) on dry asphalt.

Speed	30	40	50	60	70	80
Breaking Distance	66.3	82.3	100.5	121.2	142.3	160.7

b) Find the least squares regresssion line. Round the slope and y-intercept to two decimals.

B(x) =

(c) Find the linear correlation coefficient. Round your answer to 4 decimals.

r =

(d) Comment on whether a linear model is a good model. Explain why. This part will be hand graded.

(e) Predict the breaking distance if you were going 65 miles per hour. Use your rounded values from part (b).

(f) What speed would you be traveling at if you needed 200 feet to break? Use your rounded values from part (b).

Expert Solution

orchestra answered 1 year ago

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