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If a line has a slope m then a line perpendicular to it has a slope -1/m ( negative inverse). For example if a line has slope positive 2, its perpendicular has slope -1/2
[A Parallel line is a straight line, opposite to another, that do not intersect or meet.] Ie. Line 1 is Parallel to Line 2. ------------------------------------------------- <Line 1 ------------------------------------------------- <Line 2
The next line is 3 1 2 2 1 111 12 11 2 1 11 1 1 2 2 13 1 2 2 1 1
Perpendicular line = - 1/gradient= - 1/2/3= - 3/2
parallel lines have the same slope. So if you equation if 5y+x=2 for example, you can solve for y and then look at the coefficient of x, that number is the slope. So in the example 5y+x=2, 5y=-x+2 or y=-1/5x+2/5 The slope is -1/5 so any line with that slope will be parallel. The 2/5 is the y intercept or the location where the line hits the y axis. This can be any real number.