The set of points r(-1, 1), s(2, 4), t(6, 8) are collinear and the line has a slope of

slope of the line is (1)

Step-by-step explanation:

Set of points are R( -1, 1 ) S( 2, 4 ) and T( 6, 8 )

We have to find the slope of the line for which these points are collinear.

Since we know slope m =

for points R and S       m =

                                        = = 1

Therefore, slope of the line is (1)