28. Old Faithful The waiting time between eruptions of the Old Faithful geyser in Yellowstone National Park depends upon the length in time of the last eruption. A representative sample of 10 data pairs for the eruption duration in minutes

(x) and the waiting time in minutes till the next eruption

(y) appears here.

a. Find the least-squares line to describe the waiting time as a function of the eruption time.

b. Draw a scatterplot of the data along with the leastsquares line. What unusual feature do you see? Can you think of any way to explain this feature?

Transcribed Image Text:

x 4.317 3.967 4.7 4.283 2.267 4.716 2.017 4.117 4.733 1.8 y 81 89 83 79 55 90 49 79 75 53