Question

The line plot below represents the number of letters written to overseas pen pals by the students at CityvilleMiddle School. Each x represents 2 students. How many students wrote more than 6 and fewer than 20 letter.

Answer 1

We need to know how many students wrote more than 6 and fewer than 20 letters. Then, we count the number of x from 7 to 19:

7: 3

8: 2

9: 4

10: 0

11: 1

12: 0

13: 3

14: 2

15: 4

16: 0

17: 1

18: 2

19: 4

Then, adding these values:

`\#\text{ of x }=3+2+4+1+3+2+4+1+2+4=26`

Since each x represents two students, the corresponding number of students is:

`\begin{gathered} \#\text{ of students }=\#\text{ of x }\cdot2=26\cdot2 \\ \Rightarrow\#\text{ of students }=52 \end{gathered}`