Answer:
the desired equation is y = x - 4
Explanation:
If we look carefully we see that for each unit increase in x, y increases by 1.
From x = 3 to x = 4, an increase of 1, y increases from -1 to 0, also an increase of 1. Thus, the slope of the line on which these points lie is just m = 1.
Starting with y = mx + b, let's substitute 4 for x and the associated 0 for y and find b: 0 = 1(4) + b, so b = -4, and
the desired equation is y = x - 4.