(5.30) 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 =2.38+0.02D."

What is the slope of the regression line? (Round your answer to the nearest hundredth.)

This means that on average, if the length of the dive increases by one meter, the diving duration increases by minutes. (Round your answer to the nearest hundredth.)

According to the regression line, how long does a typical dive to a depth of 230 meters last? minutes. (Round your answer to the nearest tenth.)