And so this is equal to 1 4th. And so the equation of our line is going to be y is equal to 1 4th x plus b. Now we need to solve for b. 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.