So we just have to figure out its slope, because that is going to be the rate of change of that function right over there. It's derivative. It's going to be the slope of the tangent line, because this is the tangent line. So let's do that. So as we know, slope is change in y over change in x. So if we change our, to go from two comma three to seven comma six, our change in x, change in x, we go from x equals two to x equals seven, so our change in x is equal to five. And our change in y, our change in y, we go from y equals three to y equals six, so our change in y is equal to three.