determine if the line containing points a and b is perpendicular, parallel or neither to the line containing points c and d.
A (4,0) B (1,9) C (5,3) D(0,6)

- anonymous

- jamiebookeater

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- anonymous

find the slope of the line connecting the points A and B
find the slope of the line connecting the points C and D
post your answer here.

- anonymous

do you know how to find the slope when two points are given?

- anonymous

IS SLOPE 3
LINE C,D 3/5

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## More answers

- anonymous

-3/5

- anonymous

the slope of line CD is -3/5
what is the slope of the line AB?

- anonymous

3

- anonymous

sure? it is (9-0)/(1-4)

- anonymous

-3

- anonymous

okay good
so what is the condition for two lines to be parallel and perpendicular to each other?

- anonymous

HAVE SAME SLOPE

- anonymous

you have to be more specific than that. what are you talking about?

- anonymous

SO ITS PARALLEL

- anonymous

okay, the lines are parallel if the slopes are the same.
is -3 equal to -3/5?

- anonymous

NO

- anonymous

idk thats the part i get confused on

- anonymous

okay, the two slopes are not the same. there fore the two lines are not parallel.
now, what is the condition for two lines to be perpendicular?

- anonymous

their slope are negative reciprocal of each other

- anonymous

okay so what is the negative reciprocal of -3?

- anonymous

-3/1

- anonymous

no, try again. if x is your number, -(1/x) is its negative reciprocal

- anonymous

so if -3 is your number, what is its negative reciprocal?

- anonymous

-1/3

- anonymous

no! it is -(1/(-3)) = 1/3.
so, is 1/3 equal to -3/5?

- anonymous

no

- anonymous

so then the lines are not perpendicular. So your answer is the lines are neither parallel nor perpendicular to each other.

- anonymous

k i thnk i get it sorry kinda a slow today appreciate your patience:) gonna try these other similiar problems thanks again....

- anonymous

okay you are welcome.

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