If you plot all of the points, you'll see they all fall on the same straight line. The slope of this line is m = -4 Each time x increases by 1, y decreases by 4
Going in reverse, if we decrease x by 1, then we increase y by 4 So the pair (x,y) = (1,4) shown in row 2 will lead to (0,8) if we use the trick of increasing y by 4 when decreasing x by 1.
Another way to see this is to use m = -4 with (x,y) = (1,4) and you'll find that b = 8. So the equation of this line is y = -4x+8
Or you can use a graphical method to find the y intercept
Either way, the answer is 8. This is where the graph crosses the y axis.
