The following dot plot depicts the spelling test scores, in percents, of Mrs. Michael's fifth grade class. According to the dot
plot, how many students earned at least a 90%?
Type a numerical answer in the space provided. Do not type any spaces in your answer.
_______a0<=====answer please
Type a numerical answer in the space provided. Do not type any spaces in your answer.
_______a0<=====answer please
1 answer:
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The standard form of this equation is
The slope of two parallel lines i the same, so the slope of the line we're looking for is also
Since the line passes through
, the equation is:
The slope of two parallel lines i the same, so the slope of the line we're looking for is also
Since the line passes through
Given that:
Consider it is instead of 10 on two places.
is between 3 and 4. So, Beau thinks a good estimate for
is = 3.5.
Solution:
To find , Beau found 3² = 9 and 4² = 16.
He said that since 10 is between 9 and 16.
Since 10 is close to 9, therefore must be close to 3. So, Beau's estimate is high.
Now,
Since, 10 lies between 9.61 and 10.24, therefore must be lies between 3.1 and 3.2.
Therefore, the estimated value of is 3.15.