Given y = x^2, which of the following moves the graph up? y ='(x + 5)2
y = x2 – 25
y = x² + 5
y = (x – 5)2
y = x² – 5

Each equation given below describes a parabola. which statement best compares their graphs? x = 2y^2 x = 8y^2

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.

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4