This is at 3, 1, 2, 3, plus negative 2x plus 3. So where we're, the part of f of x where clearly it equals negative 2 at some point of that, this part of f of x is defined by this line. Obviously, this part of f of x is not defined by that line. But to figure out the exact value, we just have to figure out when this line is equal to negative 2. So we have negative 2x plus 3 is equal to negative 2. And remember, this is what f of x is equal to over the interval that we care about. If we were talking about f of x over there, we wouldn't be able to put negative 2x plus 3.