Let's say that this is our function. So maybe our function maybe looks something like this. I don't know what, well, this one in particular probably looks something like this. This one in particular, this one in particular might look, who knows, and then it might look something like that. And the particulars aren't that important. We just have to think about what they're asking. In order for it to be continuous here, the limit as we approach from the left, the limit as we approach from the left, so the limit as we approach zero from the left, should be equal to the value of the function at zero.