It's going to look something like this. You can almost imagine it as somewhat of a kind of a bowl. Or you can even think of it as a three-dimensional parabola, if you want to think of it that way. Instead of a parabola that just goes like this, if you were to kind of rotate it around and distort it a little bit, you would get this thing that looks kind of like a cup or a thimble or whatever. What we want to do is we want to find the m and b values that minimize. Notice this is a three-dimensional surface. I don't know if I'm doing justice to it.