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marird15
Group Title
How can u tell whether these lines are parallel or perpendicular or neither with out graphing?
line 1; through (1,9) and (6,6)
line 2; through (7,23) and (0,2)
 2 years ago
 2 years ago
marird15 Group Title
How can u tell whether these lines are parallel or perpendicular or neither with out graphing? line 1; through (1,9) and (6,6) line 2; through (7,23) and (0,2)
 2 years ago
 2 years ago

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RyanL. Group TitleBest ResponseYou've already chosen the best response.1
(1,9) and (6,6) : slope =3 (7,23) and (0,2): slope=3 same slope means lines are parallel
 2 years ago

marird15 Group TitleBest ResponseYou've already chosen the best response.1
how did you figure that out with out graphing?
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.0
there is a formula to find the slope of line with 2 points given....
 2 years ago

radar Group TitleBest ResponseYou've already chosen the best response.0
They calculated the slope of each line using \[\Delta y \over \Delta x\] When the slopes are equal to each other (in this case they were both 3) they are parallel. If they were negative reciprocals like one was 3 and the other 1/3. then they would of been perpendicular.
 2 years ago

hartnn Group TitleBest ResponseYou've already chosen the best response.0
for perpendicular,slopes must be negative inverse
 2 years ago

RyanL. Group TitleBest ResponseYou've already chosen the best response.1
@radar I used that method....sorry for nothing showing my work.
 2 years ago

marird15 Group TitleBest ResponseYou've already chosen the best response.1
ohhhh. okay i got it. and its okay @RyanL.
 2 years ago

radar Group TitleBest ResponseYou've already chosen the best response.0
@RyanL, good work, I was just trying to assist. I want to explain what a negative reciprocal is, because by the questions being submitted he is going to need to understand that too.
 2 years ago

radar Group TitleBest ResponseYou've already chosen the best response.0
One number is a negative reciprocal of another number if their product is 1.
 2 years ago

marird15 Group TitleBest ResponseYou've already chosen the best response.1
its alright.. and okay thanks.. again. lol
 2 years ago
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