Question

Juan started his bank account with a $100 deposit and put in $38 a week. What is the formula for calculating how much money is in his bank account?

Answer 1

Let J(x) = formula for calculating the amount of money Juan will have in the bank after a certain number of weeks.

J(x) = 100 + 38x

Answer 2

`M=38w+100`

Explanation:

We can model this as a linear equation where the money in his account is
`M`, the initial deposit is
`d` and the # of weeks is
`w`.

Then we set up equation as:

`M = aw + d`

Where
`a` is how much money he puts in per week.

So putting in values we have:

`M=38w+100`