### Home > CCAA8 > Chapter 2 Unit 2 > Lesson CCA: 2.3.2 > Problem2-93

2-93.

Greta is opening a savings account. She starts with $\100$ and plans to add $\50$ 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 $1$ year?

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

The $y$-intercept, or $b$, 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 $x$ is the week number.