Remark
I can see why you are having trouble. We don't know anything about the bike but we can figure out the car part of the question.
Start with the 2000 dollars. That's the y intercept. You have not done anything to start with. So your equation looks like this.
y = ax + b
y = ax + 2000 Now you are told that you save 100 dollars a week. That is "a s" value.
y = 100x + 2000
Finally you want to know how many weeks it will take to get to 6200 dollars.
Let y = 6200 dollars. What is x
6200 = 100x + 2000 Subtract 2000 from both sides.
6200 - 2000 = 100 x
4200 = 100 x Divide by 100
4200 / 100 = x
x = 42
It will take 42 weeks to save have 6200 in your savings account. <<<Answer
