On a coordinate plane, points (0.5, 2), (4, 16), and (6.5, 26) are plotted. Natalie made a graph showing these ordered pairs representing a proportional relationship. (0.5, 2), (4, 16), (6.5, 26)

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

How can you tell when x and y are not directly proportional?

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)