Jessica is selling books during the summer to earn money for college. She
a 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) = 10x - 35, where xis 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 Jessica's function represent?
•
A. For each additional set of books she sells, her earnings will
increase by $35.
•
B. For each additional set of books she sells, her earnings will
increase by $10.
O C. For each additional door she knocks on, her earnings will increase
by $10.
• D.
For each additional door she knocks on, her earnings will increase
by $35.