The table shows three functions and their output values for different values of x.
Which equation represents h(x)?
Oh(x) =
f(x)
9(x)
х
1
2.
3
3
9
27
g(x)
18
21
h(x)
15
12
-3
Oh(x)
24
g(x)
f(x)
Oh(x) = f(x) - g(x)
Oh(x) = g(x)-f(x)

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.