SOLUTION
Find the length of the segment connecting (-2, 1) and (6. - 1) .
In this question, we have the formulae for length segment
D^2 = ( x 2 - x 1 ) ^2 + ( y2 - y 1 )^2
( x 1 , y 1 ) = (-2, 1) , ( x 2 , y 2 ) = ( 6 , -1 )
D^2 = ( 6 - - 2 ) ^2 + ( -1 - 1 ) ^2
D^2 = ( 8 ) ^2 + ( -2 )^2
D^2 = 64 + 4
D^2 = 68
square- root both sides, we have
D = 8.246
D = 8 . 2 ( nearest tenth)
