A city has a 5% sales tax. Is there a proportional relationship between the cost of items before tax and the cost of items after tax?
Yes or No

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