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Mathematics 10 Online
OpenStudy (anonymous):

find the slope of the line perpendicular to the line through the points (18,9) and (9,2)

OpenStudy (mertsj):

Can you find the slope of the line between the two given points?

OpenStudy (anonymous):

yes just not sure how to

OpenStudy (mertsj):

Subtract the y values. Subtract the x values. put the first number over the second. That is the slope.

OpenStudy (mertsj):

What did you get?

OpenStudy (anonymous):

-7/9 but it is perpendicular

OpenStudy (mertsj):

Did you do the subtraction in the same order?

OpenStudy (mertsj):

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