WILL GIVE BRAINLIEST Bill 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 Bill has been adding money. 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 the starting amount of money in the account?

Change per week: 40

Starting amount: 450

Step-by-step explanation:

Since x represents the number of weeks Bill was adding money, that means he was adding 40 dollars to the account each week.

The starting amount was 450 because x represents the amount of weeks he was putting in money and x is by 40, not 450.

The amplitude is 4.

Step-by-step explanation:

Given the form of the sine function:

Where is the amplitude, is the period and "k" is the vertical shift of the wave.

You know that, in the sine function given ( ), you can identify the amplitude and the period. These are:

Therefore, the amplitude of   is: