Surya gave each member of his family a different playlist of random songs to listen to and asked them to rank each song between 000 and 101010. He compared his family's rankings with the release year of each song and created the following scatterplot and regression line. The fitted line has a slope of -0.096−0.096minus, 0, point, 096.
What is the best interpretation of this slope?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297