Answer:
B
Using gradient of two points and equation of a straight line graph.
0.9 is the answer hope it helps.
Answer:d
Step-by-step explanation:because that would come up with the most information from sciencetist and professors
The dot plots is an illustration of charts and graphs
The average score of period 7 is greater than the average score of period 1
<h3>How to determine the period with the higher average?</h3>
From the dot plots in the complete question, we have the following frequency tables
<u>Period 1</u> <u>Period 7</u>
Score Students Score Students
55 1 65 1
70 1 75 3
75 6 80 5
80 6 85 6
85 2 90 3
90 3 95 2
95 1
The average is calculated using:

For period 1, we have:

Evaluate the sum

Evaluate the quotient

For period 7, we have:

Evaluate the sum

Evaluate the quotient

By comparison, 83 is greater than 79.5
Hence, the average score of period 7 is greater than the average score of period 1
Read more about dot plots at:
brainly.com/question/12276901