The graph shows that lisa's earnings are proportional to the number of hours that she works. this relationship can be represented by an equation in the form y = kx. what is the value of k in the equation?

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