It not c i know that for sure but i nee help
2 answers:
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Answer:
is not a function
Step-by-step explanation:
Given
Required
Which is not a function
A function is of the form
Assume a function is:
In simple terms:
For an ordered pair to be regarded as a function, no x value must be repeated
Analyzing the options:
1.
This is a function because none of the x values (-3, 8, 0 and -9) appeared more than once
2.
This is a function because none of the x values (5, -3, 0 and -9) appeared more than once
3.
This is a function because none of the x values (9, -5, 5 and 6) appeared more than once
4.
This is not a function because one of the x values (2) appeared more than once.
i.e.
and
Answer:
And rounded up we have that n=656
Step-by-step explanation:
In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 80% of confidence, our significance level would be given by and
. And the critical value would be given by:
Solution to the problem
The margin of error for the proportion interval is given by this formula:
(a)
Since we don't have prior info for the proportion of interest we can use as estimator. And on this case we have that
and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
And replacing into equation (b) the values from part a we got:
And rounded up we have that n=656