<s>[INST] In a study to investigate the relationship between the number of hours of exercise and the number of calories burned per hour, the following data were collected:
$$\begin{array}{c|c} \text{Hours of Exercise} & \text{Calories Burned}\\ \hline 1.5 & 450\\ 2 & 500\\ 2.5 & 525\\ 3 & 550\\ 3.5 & 590\\ 4 & 600\\ 4.5 & 600\\ 5 & 650\\ 5.5 & 670\\ 6 & 700\\ \end{array}$$
What is the equation of the least squares regression line?[/INST]