Does this set of ordered pairs represent a function? why or why not?
{(-2,2), (-1,2), (3, -,,11)}
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a. no, because two of the y-values are the same.
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b. yes, because every x-value corresponds to exactly one y-value.
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c. no, because one x-value corresponds to two different y-values.
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d. yes, because there are two x-values that are the same.

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables