Find the slope of the lines that are (a) parallel lines (b) perpendicular lines to the lines passing through the pair of points (3, 4)(2,-1)
math - Reiny, Monday, November 4, 2013 at 4:05pm
Find the slope of the line joining your two given points (you should know how to do that)
A line parallel will have the same slope
A line perpendicular will have a slope which is the negative reciprocal of the given slope
let me know what you get
math - Bridget, Monday, November 4, 2013 at 4:21pm
Slope is 5
Parallel is 5 or 1/5
Perpendicular is -5
math - Reiny, Monday, November 4, 2013 at 4:49pm
your slope of the given line is correct as 5
Then a parallel line also has a slope of 5
a perpendicular line will have slope of -1/5
your statement of
"Parallel is 5 or 1/5" is illogical.
same for " perpendicular is -5" , makes no sense to me.
Perpendicular is a property, -5 is a quantity
That is like saying " funny is -5"