Ivan 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 Ivan has been adding money. Suppose that x and y are related by the equation y=550+40x. What is the change per week in the amount of money in the bank? What was the starting amount of money in the account?
Looks like 550 is starting amount and 40 is the change per week.
Note that a change can be an increase or a decrease. For an increase, use positive number. For decrease use, negative number.
Since you indicate that Ivan is only "adding money," the change will only be positive.
As of 2009, the highest temperature ever recorded in tennessee was 45 C. Find the corresponding Fahrenheit temperature.
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.
T(°C) = (T(°F) - 32) × 5/9
To find the change per week in the amount of money in the bank, we need to determine the coefficient of x in the equation y = 550 + 40x. The coefficient of x represents the change in y for every 1 unit change in x.
In this case, the coefficient of x is 40. Therefore, the change per week in the amount of money in the bank is $40.
To find the starting amount of money in the account, we can look at the equation when x is 0. Here, x represents the number of weeks Ivan has been adding money, so when x is 0, it means no weeks have passed, i.e., the starting point.
Substituting x = 0 in the equation, we get:
y = 550 + 40(0)
y = 550 + 0
y = 550
Therefore, the starting amount of money in the account is $550.