And so how do we figure out what this is? Now before we even look at this graph, you might say, okay, this is the region under, the area of the region under the graph y equals f of t between negative two and zero, but you have to be careful. Notice our upper bound here is actually a lower number than our lower bound right over here. So it will be nice to swap those bounds so we can truly view it as the area of the region under f of t above the t-axis between those two bounds. And so when you swap the bounds, this is going to be equal to negative definite integral from negative two, negative two to zero of f of t dt. And now what we have right over here, what I'm squaring off in magenta, this is the area under the curve f between negative two and zero. So between negative two and zero.