Which of the following sets of points is a direct variation? (0, 0); (2, 4); (5, 15)
(0, 0); (-1, -2); (1, 2)
(3,6); (-2, 4); (-1, 2)
(0,5); (1, 6); (2,7)

Answer this question only if you know the 30 points and

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

Find the ratios of the corresponding sides