Which equation is a linear function?

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

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

Write a function rule for the table