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 earning are approximately a liner function of the number of door she knocks on.
she writes the equation of the function like this:E(x)=10x-30,where x is the number of doors she knocks on during the week and E(x) is her earning for the weeks in dollars.
which of the following are reasonable interpretations of the y-intercept of Jessica's function?
