Answer: c.82
Explanation: Since the x axis is in minutes that means 60, the first value in both sets, is 1 hour meaning the values given for y are the scores people received after studying for 1 hour. So that means students who studied for an hour made scores in the range of 78-85, so we can speculate that any other student who studied for a hour would get a score within that range, making the correct answer c.82