And we know that the point negative one comma one is on the line, so we can use that information to solve for b. This line is tangent to the curve, so it includes this point and only that point. That's what it has in common with the curve. And so y is equal to one when x is equal to negative one plus b. And so we have one is equal to negative 1 4th plus b. You add 1 4th to both sides, you get b is equal to, we could either write it as 1 1 4th, which is equal to 5 4ths, which is equal to 1.25. We could write it any of those ways.