Manco went scuba diving. As he dove deeper, the water pressure around him increased at a constant rate. The table compares Manco's depth (in meters) and the water pressure around him (in atmospheres).
Depth (meters)
Pressure (atmospheres)
13
2.3
17
2.7
21
3.1
What is the rate of change of the water pressure?

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

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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.