Steve started at $250 and spent $20 per week. chelsea started with nothing but saved $30 per week. use x for time and y for savings.

1. write two separate equations to represent steve's and chelsea's situation.
2. after how many weeks did steve and chelsea have the same amount of money?
3. how much money will they have when they have the same amount?

y=-20x+250

y=30x

5 weeks

$150

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.