Use the least-squares equation for the table below to predict the depth of an earthquake that measures 3.8 on the Richter scale? x = earthquake magnitude 2.9, 4.2, 3.3, 4.5, 2.6, 3.2, 3.4 y = depth of earthquake (in km) 5, 10, 11.2, 10, 7.9, 3.9, 5.5