Confused on one-to-one functions. just need 11-14 plz(: u

11. YES. Because each x-value is only used once (no duplicate x-coordinates)

12. range is the y-values.  the lowest it goes is -2 (with an open dot), then it goes to +2 (with an open dot).  then there is a separate line where y = 4.

(-2, 2) U [4, 4]

13. f(-1): when x = -1, y = ???  (do not count the open dot!)

1

14. f(3): when x = 3, y = ???  (do not count the open dot!)

4

the correct answer is b) histograms can be used to exhibit the shape of distributions. this is because histograms count the frequency of each possible answer, so one is able to see which results are more common and which are less common.