Given:
There are given the equation:

Step-by-step explanation:
According to the question:
First, we need find the change per week in the amount of money.
So,
We need to compare this equation with the standard form of the equation:
So,

So,
If m>0, then the change will increase, and if m<0, the change will be decreased.
So,
The amount of money change per week is 30.
And,
The starting amount of money is 550.
Final answer:
Hence, the answer of both part is shown below:
