A lifeguard earns $320 per week for working 40 hours plus $12 per hour worked over 40 hours. A lifeguard can work a maximum of 60 hours per week. Which statement describes the y-intercept of the graph?

The y-intercept of this graph tells us that if NO overtime is done by the lifeguard, then his fixed weekly income is $320, no matter what.
Accordingly, 3rd aswer choice is the best.
Correct Answer: 3rd