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Mathematics 20 Online
OpenStudy (just_one_last_goodbye):

Please help me on a question. MEDAL

OpenStudy (just_one_last_goodbye):

What is the slope of a line that is perpendicular to segment AB if the coordinates of A and B are (-4, 1) and (1, -1)

OpenStudy (alexandervonhumboldt2):

use slope formula

OpenStudy (alexandervonhumboldt2):

\[\frac{ y_1-y_2 }{ x_1-x_2 }\]

OpenStudy (alexandervonhumboldt2):

\[\frac{ 1+1 }{ -4-1 }=?\]

OpenStudy (just_one_last_goodbye):

2/-5

OpenStudy (alexandervonhumboldt2):

perependicular lines have negative reciprocal slopes

OpenStudy (alexandervonhumboldt2):

yes this is -2/5

OpenStudy (alexandervonhumboldt2):

now find the negative reciprocal to -2/5

OpenStudy (just_one_last_goodbye):

How do I do that?

OpenStudy (alexandervonhumboldt2):

flip the fraction and change the sign

OpenStudy (alexandervonhumboldt2):

@just_one_last_goodbye can you flip the fraction and change the sign - to +?

OpenStudy (just_one_last_goodbye):

is that an action I take or is that a must?

OpenStudy (alexandervonhumboldt2):

you have to do it to find a slope or perpendicular line

OpenStudy (just_one_last_goodbye):

so... 2/5

OpenStudy (alexandervonhumboldt2):

nooooooooooooooooooooooooooooooooooooo

OpenStudy (alexandervonhumboldt2):

FLIP IT!!!!!!!!!!!! LOOL and then change the sign

OpenStudy (just_one_last_goodbye):

Oh 5/2

OpenStudy (just_one_last_goodbye):

Thanks :D

OpenStudy (bubblegum.):

no explain

OpenStudy (alexandervonhumboldt2):

yeah lol

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