SOLUTION:
We are to make S the subject of the formula;

The correct option is the third one.
y-intercept is -3 so it must pass the vertical line -3.
Now start from point (0,-3) and rise up by 3, then go right by 1 since the slope is 3/1 or 3.
It should look like this:
The total area of Alaska in sq miles is 591,004 sq miles.
The answer is : (3x-1)(x+4)