Question

1.Clare recorded the amounts of time spent doing homework, in hours per week, by students insixth, eighth, and tenth grades. She made a dot plot of the data for each grade and provided thefollowing summary.Students in sixth grade tend to spend less time on homework than students in eighth andtenth grades.The homework times for the tenth-grade students are more alike than the homework timesfor the eighth-grade students.no

Answer 1

Each point in the plot represents a student.

From the first statement we know that:

"Students in sixth grade tend to spend less time on homework than students in eighth and tenth grades."

We must look the three plots and see which one has more dots in the lower numbers of hours.

We can see that the plot B is the plot with more dots in the region of lower numbers of hours.

So from that we can say that the plot B correspond to the sixth grade.

Now we must read the next statement in order to know which plot correspond to the eighth and tenth grades.

The next statement tell us that:

"The homework times for the tenth-grade students are more alike than the homework times for the eighth-grade students."

So, the key is in: "the tenth-grade students are more alike", the meaning of that is that the points are more scattered or dispersed. If we compare the plot A and C, we see that the points in A are more scattered or dispersed than in the plot C. So, the plot A corresponds to the tenth grade, and the last one (plot C) to the eight grade.