What is the common difference of the arithmetic sequence graphed below? an 2 3 4 5 6 7 8 9 n -2+ -3 • (1, - 3.75) (2, - 4.5) -5+ bullet(3,-5.25) (4, - 6) -7 (5, - 6.75) bullet(6,-7.5) -8 (7, - 8.25) -9 (8, - 9)

Which is the correct excel formula for the 80th percentile of a distribution that is n(475, 33)? =norm.dist(80,475,33,1) =norm.inv(0.80,475,33) =norm.s.inv((80-475)/33)?

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

If 25% of y is 30, what is 60% of y?