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 Video Questions and Answers on Equations of Straight Lines

Without drawing, determine which of the following pairs of lines are perpendicular.
(a) y= 3x– 1
y = #3/2#x - 4
(b) y = #2/3#x + 4
2y+3x=8
(c) 2y – 7x = 4
y= #2/7#x - #1/2#
(d) y= -#3/4#x - 2
y= -#4/3#x + 5.

 (3m 19s)
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