Question

q 7.) the line plots compare the test scores for a first- & second - period math class. what is the average number of points in the first - period math class?

Explanation:

Step1: Count the number of data - points

For the first - period class, count the number of 'x's. There are 1 + 2+3 + 2+1=9 data - points.

Step2: Calculate the sum of the points

Multiply each score by the number of 'x's at that score and sum them up.
(2×1)+(3×2)+(4×3)+(5×2)+(6×1)=2 + 6+12 + 10+6 = 36.

Step3: Calculate the average

The average (mean) is the sum of the points divided by the number of data - points.
Average=$\frac{36}{9}$ = 4.

Answer:

4