The scatter plot shows the relationship between the number of homework assignments turned in over a week and the test score for that same week:
part a: what is the group of points labeled x called? what is the point labeled y called? give a possible reason for the presence of point y.
part b: describe the association between a student's test scores and the number of homework assignments submitted. (what does association mean in this? )

X is a cluster and Y is an outlier; Y could have been because the student turned in 1 assignment and did not study; and there is an increasing association between these two, meaning that as the number of assignments turned in increased, the score on the test increased.

Step-by-step explanation:

Part A:  A group of points in a scatter plot is called a cluster.  A point that is very different from the rest of the data is called an outlier.  Since this outlier was about assignments completed and test scores, this could have been caused by someone not studying.

Part B:  The association is increasing; this is because the points tend to increase on the y-axis as the x-values increase.  This means that as students submitted more homework assignments, their grades on tests increased.

true

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional