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20-10-2017
Mathematics

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What is the equation of this line in standard form?

A. −8x+9y=23
B. −8x+9y=−23
C. −8x+7y=25
D. −9x+8y=−23

What is the equation of this line in standard form A 8x9y23 B 8x9y23 C 8x7y25 D 9x8y23 class=

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20-10-2017

the slope is (3- (-1)) / ((1/2 - (-4))

= 4 / 4/5 = 8/9

y-y1 = (8/9)(x - x1

y - (-1) = (8/9) ( x - -4)

y + 1 = (8/9)x + 4)

y = 8/9x + 32/9 - 1

y = 8/9x + 23/9

9y = 8x + 23

-8x + 9y = 23

Its A

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