Is the line y=3x-7 parallel or perpendicular to 3x+9y=9?
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Hi Mate!!
Two lines are // if their slopes are equal.
and
Two lines are perpendicular if product of their slopes = -1
Case 1 :-). //
Slope of ist line = 3
Slope of second line = -1/3
slopes are not equal so, the given two lines are not in //
Case 2:-) perpendicular.
Product of slopes = 3 ( -1/3) = -1
Product of two slopes is = -1 so, the given two lines are perpendicular to each other.
Slope of any line in the form of ax + by + c = 0
is -a/b
Have a NYC day.
Two lines are // if their slopes are equal.
and
Two lines are perpendicular if product of their slopes = -1
Case 1 :-). //
Slope of ist line = 3
Slope of second line = -1/3
slopes are not equal so, the given two lines are not in //
Case 2:-) perpendicular.
Product of slopes = 3 ( -1/3) = -1
Product of two slopes is = -1 so, the given two lines are perpendicular to each other.
Slope of any line in the form of ax + by + c = 0
is -a/b
Have a NYC day.
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