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January 30, 2015

January 30, 2015

Posted by **stacy** on Sunday, January 23, 2011 at 3:42pm.

- math -
**Reiny**, Sunday, January 23, 2011 at 3:55pmslope = (b-a)/2

using (2,a)

y-a = (b-a)/2 (x-2)

times 2

2y - 2a = (b-a)(x-2)

2y - 2a = bx - 2b - ax + 2a

ax - bx + 2y = 4a - 2b

(a-b)x + 2y = 4a - 2b

check if point not used lies on it ....

LS= (a-b)(4) + 2(b)

= 4a - 4b + 2b

= 4a - 2b

= RS

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