can you help me with the python problem below

4. Given a list of points of the form [(z?, yi), (T2,y2), , (zn,yn)], write a function called plotRegression that accepts a list as a parameter and uses a turtle to plot those points and a best-fit line according to the following formulas: where is the mean of the x-values, y is the mean of the y-values, and n is the number of points. The Greek letter represents the sum operation. For example, i indicates the addition of all the x values. Your program should analyze the points and correctly scale the window using setworldcoordinates so that each point can be plotted. You should then draw the best-fit line in a different color through the points