So let's substitute negative one and three for x and y. So when y is equal to three, so three, three is equal to, is equal to negative two, negative two times x times negative one, times negative one plus b, plus b. And so let's see, this is negative two times negative one is positive two. And so if you subtract two from both sides, you get one is equal to b. And there you have it. That is the equation of our line. Y is equal to negative two x plus one.