Which relationship shows a quadratic variation?
a. x 1 2 3 4
f(x) 4 3 2 1
b. x 1 2 3 4
f(x) 2 5 10 17
c. x 2 3 4 5
f(x) 1 4 9 16
d. x 1 2 3 4
f(x) 2 8 18 32

What is the inverse of the function f(x) = 2x + 1?

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet