Question

You put some money in a bank account one year ago

You have not done anything with it since.
The bank takes out a low balance fee of $0,25 each month,
After 8 months, you had $28 in the account.
Choose the equation that best shows the money in your bank account over time.

Answer 1

Answer: Balance-28=-0.25(months-8)

Explanation:

Answer 2

`Balance-28=-0.25(Months-8)`

Explanation:

Givens

• Tha bank takes out $0.25 each month. This means the constant ratio of variatio is 0.25 and has to be negative, because it represents a decreasing ratio.
• After 8 months, you had $28.

So, basically, we need to think this from a linear model persepective, where the given point is
`(8,28)` and the slope of the line that represents it is
`m=-0.25`.

Then, we recur to the point-slope formula

`y-y_(1) =m(x-x_(1) )`, where
`x_(1)=8` and
`y_(1)=28`, replacing these values, we have

`y-y_(1) =m(x-x_(1) )\\y-28=-0.25(x-8)`

Where
`y` is BALANCE and
`x` is MONTHS. So,

`Balance-28=-0.25(Months-8)`

Therefore, the right answer is the choice at the upper right corner

`Balance-28=-0.25(Months-8)`