Which of the following rational functions is graphed below? a: f(x) = 3/x
b: f(x) = x/x+3
c: f(x) = 1/x(x+3)
d: f(x) = 1/x(x-3)

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.