Which of the following relations is a function? A{(1, 3), (2, 3), (4,3), (9. 3)}

B{(1, 2), (1, 3), (1.4), (1,5)}

C{(5, 4), (-6, 5), (4, 5), (4, 0)}

D{(6,-1), (1, 4), (2, 3), (6, 1)}

Which of the following expressions is equal to 2x^2+8

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.

For g(x) = 5x - 3 and h(x) = [tex]\sqrt{x}[/tex], find (g · h)(4)