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Home > CCA > Chapter 2 > Lesson 2.3.2 > Problem 2-93


Greta is opening a savings account. She starts with and plans to add each week. Write an equation she can use to calculate the amount of money she will have after any number of weeks. How much money will she have after year?

is the number of weeks starting with week 1, and is the amount of money.

The -intercept, or , is the original (starting) price. The slope is the growth rate.
Both of these are given in the problem.
Substitute them into the equation.

There are 52 weeks in a year.
Remember that is the week number.