And then she plotted her sample for every phone would be a data point. And so you see that. And then she put those data points into her computer and was able to come up with a line, a regression line for her sample. And her regression line for her sample, if we say that's going to be y is, or y hat is going to be a plus bx. For her sample, a is going to be 127.092, so that's that over there. And for her sample, the slope of the regression line is going to be the coefficient on speed. Another way to think about it, this x variable right over here, speed, so the coefficient on that is the slope.