Home > AC > Chapter 13 > Lesson 13.IF2-S > Problem 6-31
Barnaby’s grandfather is always complaining that back when he was a teenager, he used to be able to buy his girlfriend dinner for only
If that same dinner that Barnaby’s grandfather purchased for
sixty years ago now costs , and the price has increased exponentially, write an equation that will give you the costs at different times.
Begin by defining variables.
the number of years
the cost of a dinner
You need to write an equation of the form
Use the points
and to write and solve a system of equations.
How much would you expect the same dinner to cost in
in your equation from part (a).