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

Question

3 months ago

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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.

Mathematics

2 answers:

Svet_ta [12.7K] · Answer 1 · 2026-02-18T20:13:36+03:00

Answer:

Her weekly expenses amount to $25.

Detailed reasoning:

Given: Jessica earns commissions for every sale but must cover her own spending costs.

She expresses her income function as $E(x) = 7x - 25$ , where x represents the number of doors she approaches in a week and E(x) denotes her weekly earnings in dollars.