HELP!!!!!!!
which are perpendicular lines?
y= -2
y= -1/2x-4
y-4=2(x+3)
y= -2x
2007-01-17 14:13:16 · 4 answers · asked by Nate K 2 in Science & Mathematics ➔ Mathematics
y= -1/2x-4
y-4=2(x+3)
the slopes are opposite reciprocals
2007-01-17 14:19:02 · answer #1 · answered by Taras 2 · 0⤊ 0⤋
Two lines are perpendicular when the slopes are m and -1/m
so...
y = -2 has zero slope or flat-line
y = -1/2x - 4 has a -1/2 slope
y - 4 = 2(x+3) rearranged y - 4 = 2x + 6 or y = 2x + 10
the slope is 2
y = -2x the slope is -2
Sooo
y=-1/2x - 4 AND y - 4 = 2(x+3) are perpendicular
2007-01-17 22:19:48 · answer #2 · answered by lostlatinlover 3 · 1⤊ 0⤋
2 and 3 one
2007-01-17 22:17:00 · answer #3 · answered by MS32291 4 · 0⤊ 0⤋
graph them using a graphing calculator and see which ones make a right angle.
2007-01-17 22:21:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋