Question

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) = 20x – 50, where x is the number of doors she knocks on during the week and E(x) is her earnings for the week in dollars.

Answer 1

QUESTION:
Which of the following are reasonable interpretations on the y-intercept of Jessica’s function?
A. She can earn $20 per week if she does not knock on any doors
B. if she does not know on any doors at all during the week. she will lose $150
C. she will lose $20 per week if she does not know on any doors
D. Her expenses are $50

Answer 2

Okay the answer is "Her expenses are $50" and "if she does not know on any doors at all during the week. she will lose $50." (not 150!!!)