The scatter plot shows the relationship between the test scores of a group of students and the number of hours they spend on social media in a week: a scatter plot is shown. the x-axis is labeled hours spent on social media, and the y-axis is labeled test score. data points are located at 0.5 and 100, 2 and 100, 1 and 95, 3 and 85, 3 and 78, 5 and 75, 5 and 72, 6 and 70, 6 and 98, 7 and 60. a circle labeled a includes all of the points except for the one at 6 and 98. point 6 and 98 is labled b. part a: what is the group of points labeled a called? what is the point labeled b called? give a possible reason for the presence of point b. (3 points) part b: describe the association between a student’s test scores and the number of hours spent on social media. (2 points)

Part A:

The group of points labeled "group A" is either the "main group" or the "main cluster", or something along those lines. I'm not sure what exact term your teacher is looking for here. 

For point B, that point is an outlier. It is away from the main group or cluster of points. It's on an "island" so to speak.

One explanation is that this person (point B) is a natural at taking tests and doesn't need to study too much, which is why they spent a lot of time on social media yet still got a good grade. 

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Part B

There is negative association going on here. The reason why is because as x increases, y generally decreases (ignore the outlier). Which makes sense: as time spent on social media goes up, there is less time to study so generally the test grades would be lower. Of course there are exceptions such as the point B outlier.

We have fairly linear association here, but it's not perfect linear association. See the attached image. The green line is the regression line or the line of best fit. It is fairly close to all of the points. The only exception is that B is furthest away which is expected of an outlier.

The slope best fit isc. 1/6 mile per hour