Different points are used to identify the line, this can mean that both points lie on the same line.
Therefore the slope is the same because the line passes through both those points.
THE ANSWER IS 2 GOODLUCK.
The answer will be 1 and n which make the sum equal n+1. Hope it help!
3 times....................
it is a linear function y=x has a slope of 1 and goes thru the origin