when given the slope of a linear regression with the points (2,3), (4,7), and (6,8) how do you find the y-intercept?
The best-fit linear regression equation to your three points is y = 1 + 1.25x (see graph below). hence the y-intercept is y=1.

Rather than go into the details of how this line is calculated here, have a look at http://i60.tinypic.com/rl97o1.png for example.
The best-fit linear regression equation to your three points is y = 1 + 1.25x (see graph below). hence the y-intercept is y=1.

Rather than go into the details of how this line is calculated here, have a look at http://i60.tinypic.com/rl97o1.png for example.