Jessica is selling books during the summer to earn money for college. She earns a commission on each sale but has to pay for her own expenses. After a month of driving from neighborhood to neighborhood and walking door-to-door, she figures out that her weekly earnings are approximately a linear function of the number of doors she knocks on. She writes the equation of the function like this: E(x) = 7x - 25, where x is the number of doors she knocks on during the week and E(x) is her earnings for the week in dollars. Which of the following are reasonable interpretations of the y-intercept of Jessica's function? Check all that apply. A. She will lose $7 per week if she does not knock on any doors. B. She can earn $7 per week even if she does not knock on any doors. C. If she does not knock on any doors at all during the week, she will lose $25. D. Her expenses are $25 per week.