Thursday

July 24, 2014

July 24, 2014

Posted by **sharon** on Sunday, July 13, 2014 at 9:40pm.

1.y=7x-9

slope=-7

y-intercept=-9

2.-3y=21x+7

y=-7x(7/3)

slope=-7

y-intercept=-(7/3)

- Alegbra -
**Steve**, Monday, July 14, 2014 at 12:39amThey are perpendicular if the product of their slopes is -1.

So, is (-7)(-7) = -1 ?

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