If a system of linear equations has the unique solution (2, -3), then its graph consists of what?
parallel lines
lines that intersect at a single point
identical lines
a y-intercept at -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.