Here is computer output from Elise Square's regression analysis on her sample. So just to be clear what's going on, she took a sample of phones, they're not telling us exactly how many, but she took a number of phones and she found a linear relationship between processor speed and prices. So this is price right over here and this is processor speed right over here. 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.