Question

Leila is putting money into a checking account. Let y represent the total amount of money in the account ( in dollars). Let x represent the number of weeks Leila has been adding. Suppose that x and y are related by the equation 40x + 450=y Answer the questions below.Note that a change can be an increase or a decrease. For an increase, use a positive number. For a decrease, use a negative number.What is the change per week in the amount of money in the account?What was starting amount of money in the account?

Answer 1

Given the following question:

y = total amount of money

x = total number are weeks

`40x+450=y`

For the first part we are being asked the chance per week.

The chance per week is 40, since the number varies depending on the x value. So if x is = to 2 you would then multiply 40 by 2. So your chance per week is 40.

Your starting amount is 450, because 450 is consistent and it does not change no matter what the x value is. You will always have to add 450 because 450 is the money you already have which then equals y which is the total amount of money in your account.

To sum up your answers are...

40 for change per week

450 for starting amount.