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 the 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. What does the slope of jessicas function represent ?

Answer 1

would it be A. for each additional door she knocks on, her earnings will increase by $7
B. for each additional book she sells her earnings will increase by $25
C. for each additional door she knocks on her earnings will increase by $25
D. for each additional book she sells her earnings will increase by $ 7

Answer 2

Yes, you are correct. x = doors, so 7 dollars per door