Students collected data on the earnings of teenagers aged 13 through 18 who work outside of school, and the number of hours they work in a week. The line of best fit,
y=8.25x+35.7, where x represents the number of hours worked, and y represents the earnings in dollars, was calculated for the data. One teenager in the study work 15 hours a week and earns $119.95. Determine the residual for the data point and explain the meaning in words.