Answer:
The domain of x: [0,∞) or zero to infinity.
Domain of y: [-1200, ∞) or -1200 to infinity.
Slope is 400
That means that James makes 400 dollars a week mowing lawns.
y-intercept is (0, -1200)
That means James started with -1200 from buying the lawnmower.
Equation: y=400x-1200
Explanation:
Remember that the slope is always rise/run (difference of y/difference of x).
The y-intercept is when the line crosses the y-axis. You can then create an equation using y=mx+b. Where m is the slope and b is the y-intercept.