Martha surveyed 200 students at her school about the number of hours they spend
studying each day. The mean of the sample was 3.7 with a standard deviation of 0.46.
Martha can be 95% confident that the mean number of hours all the students at the
school are studying every day is 3.7 with what margin of error?
(Use the formula M = 1.96 x
where N is the sample size and s is the sample
standard deviation.)

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

typically if you want , you would actually put questions here for us to you. but hey, that's just me. maybe someone will magically answer the questions for you without knowing what they are.

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step-by-step explanation:

because that's the answer

the answer is d

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