THIS IS URGENT PLEASE HELP

Which expression gives you the distance between the points (5,1)and(9,-6)

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours