So now we just have to substitute x equals 1.9 to get our approximation for f of 1.9. So we'd say y minus one is equal to four times 1.9 minus two. 1.9 minus two is negative 0.1. And let's see, four times negative 0.1, this all simplifies to negative 0.4. Now you add one to both sides, you get y is equal to, if you add one here, you're gonna get 0.6. So this, I didn't draw it quite to scale, 0.6 might be something closer to right around there. But there you go, that is our approximation for f of 1.9, which is choice B.