Pretty me i am having a little bit of !

1- (a)-What were the different prices of the books at the bookstore.
This question can be used to collect statistical information because you need to gather information(the prices of the books)in order to find the answer of the question. 

2-(a)-I believe there are 10 dinners included in the histogram
(b)-The most popular price ranges were 15-45 dollars 

3- (a)-the median is 3.0 
I haven't learned the lower and upper quartile yet, so I cant help with that part of the question.

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.