Is the magnitude of an earthquake related to the depth below the surface at which the quake occurs? Let x be the magnitude of an earthquake (on the Richter scale), and let y be the depth (in kilometers) of the quake below the surface at the epicenter.
x | 3.0 | 4.0 | 3.3 | 4.5 | 2.6 | 3.2 | 3.4 |
y | 5.5 | 10.0 | 11.2 | 10.0 | 7.9 | 3.9 | 5.5 |
Then visualize the line you think best fits the data.
(b) Use a calculator to verify that Σx = 24.0, Σx2 = 84.70, Σy = 54.0, Σy2 = 463.56 and Σxy = 190.18.
Compute r. (Round to 3 decimal places.)
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