SOLUTION: Find the slope of the lines that pass Through each pair of the points and determine whether the lines are parallel or perpendicular.

Question 1155600: Find the slope of the lines that pass Through each pair of the points and determine whether the lines are parallel or perpendicular. (-1,3) and (5,1). (-2,3) and (0,9).
Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
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(-1,3) and (5,1). (-2,3) and (0,9).

THESE!

(-1,3) and (5,1); (-2,3) and (0,9).

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First line's slope

Second line's slope

Are the two slopes equal?
Are the two slopes negative reciprocals of eachother?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
slope = [ change in y ] / [ change in x ]
( -1,3 )
( 5,1 )

--------------------------------
( -2,3 )
( 0,9 )

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These lines are perpendicular, since

--------------------------
check:

OK

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