Whats the equation? Least square example

Question

A student wonders if tall women tend to date taller men than do short women. She measures herself, her dormitory roommate, and the women in the adjoining room; then she measures the next man each woman dates. Here are the date (heights in inches)



Women (x)
66
64
66
65
70
65
Men (y)
72
68
70
68
71
65

 

What would be the equation in the form of y=___x+____?

Answer 1

m = Σxy - (Σx)(Σy)

                   n           

          Σx² - (Σx)²

                    n    

 

to calculate the slope of the best fit line after you plot all of your (x,y) values.  Based on the slope of the line, you will be able to make your best judgement to make the answer - is the line flat, does it have a large positive slope, etc.?