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The mean speed of the 100 cars is 55.4
<h3>How to determine the mean?</h3>The table of values is given as:
Speed (MPH) Cars
30-39 5
40-49 18
50-59 50
60-69 17
70-79 10
Rewrite the frequency table to include the class midpoints
x f
34.5 5
44.5 18
54.5 50
64.5 17
74.5 10
The mean speed is then calculated as:
So, we have:
Evaluate
Hence, the mean speed is 55.4
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Answer:
-21
Step-by-step explanation:
If the equation of the line is
then is the slope of the line and
is the y-intercept of the line.
In your case, the equation of the line is
So, the slope of this line is and the y-intercept is