Part 3: Solve a real-world problem using a cube root function.

Question

Once Isabel rented the warehouse space, she decided to post ads on several social media sites to advertise her online bookstore. Let x represent the number of months the ads have been posted. Isabel finds that the function below describes the number of books sold as a function of the number of months her ads have been posted.

f(x) = 1000 + 1000

How many books were sold after 8 months?

Graph the function.

Answer 1

f(x) = 1000x + 1000

f(8) = 1000(8) + 1000

= 8000+1000

= 8000 books sold after 8 months