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19-10-2016
Mathematics

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What is the y- intercept of –3x – 9y = 18?
a. 2
b. -2
c. 6
d. -6

Respuesta :

Michaelia Michaelia

19-10-2016

Sub. x=0:
-9y=18
y=-2

so the answer is b.

Answer Link

19-10-2016

Rearrange the equation to the form:
y = mx + b
where b is the y-intercept.
-3x - 9y = 18
-9y = 3x + 18
y = -(x/3) - 2.
The answer is b. -2.

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