Answer:
The line represents a direct variation function
The line has a slope of 2
Step-by-step explanation:
In oder to find the slope given two points, use the Slope-Formula to identify the slope
m = slope
m = y2 - y1/x2 - x1
m = -8 - 10/-4 - 5
m = -18/ -9
m = 18/9
m = 2
Therefore, the slope is 2
The equation of the line of best fit is y = 1.7x - 58
<h3>How to determine the equation?</h3>
We start by drawing the line of best fit (see attachment)
From the attached graph, we have the following points
(x, y) = (70, 75) and (61, 60)
The slope (m) is:
m = (y2 - y1)/(x2 - x1)
This gives
m = (60 - 75)/(61 - 70)
Evaluate
m = 1.7
The line of best fit is then calculated as:
y = m(x - x1) + y1
This gives
y = 1.7(x - 70) + 61
This gives
y = 1.7x - 119 + 61
Evaluate
y = 1.7x - 58
Hence, the equation of the line of best fit is y = 1.7x - 58
Read more about line of best fit at:
brainly.com/question/14279419
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Answer:8
Step-by-step explanation:
We have given test consists of 40 multiple choice questions having five options for each question.
Suppose there is one correct answer to each question
therefore probabilty of getting a correct answer on making a guess is 
i.e. 1 out of 5 questions is correct
Using binomial distribution
where n=40 p=
mean of binomial distribution is np
therefore mean of no of correct answers=
=8