A study of king penguins looked for a relationship between how deep the penguins dive to seek food and how long they stay underwater. For all but the shallowest dives, there is a linear relationship that is different for different penguins. The study report gives a scatterplot for one penguin titled "The relation of dive duration (DD) to depth (D)." Duration DD is measured in minutes and depth D is in meters. The report then says, "The regression equation for this bird is: DD = 2.95+ 0.0061 D. (a) What is the slope of the regression line?. ANSWER 0.0061 minutes per meter. (b) According to the regression line, how long does a typical dive to a depth of 150 meters last? ANSWER 5.2375 minutes