Mrs. Smith is comparing the test grades between her morning and afternoon class.

Which statement BEST compares the two graphs?
A) Since the range of scores for her afternoon class was smaller by 2 points than the range for the morning class her afternoon class did better.
B) Since her afternoon class had more variability whereas her morning class was clustered around 80 this shows that her afternoon class did better.
C) Overall her morning class did better even though there were several gaps in the lower scores and larger variability in the upper scores than her afternoon class.
D) Overall her morning class did better. It was tightly clustered around 80 with some variability in grades between 40 and 70 whereas her afternoon class had much more variability in the lower grades between 40 and 60 and few scores that were above 70.

Answer is D

Step-by-step explanation:

A)  

Since the range of scores for her afternoon class was smaller by 2 points than the range for the morning class her afternoon class did better.  

B)  

Since her afternoon class had more variability whereas her morning class was clustered around 80 this shows that her afternoon class did better.  

C)  

Overall her morning class did better even though there were several gaps in the lower scores and larger variability in the upper scores than her afternoon class.  

D)  

Overall her morning class did better. It was tightly clustered around 80 with some variability in grades between 40 and 70 whereas her afternoon class had much more variability in the lower grades between 40 and 60 and few scores that were above 70.

i think the answer is seven, for if i'm being useless °ω°

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for