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Algebra :please answer #4 and show work

Algebra :please answer #4 and show work-example-1

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y=mx+b
b=y intercet or wwhere the line intercepts the y axis
you want this to be negative so it will be les than zero so cross out any answer with b is positive

its decreaseing so therefor the slope is negative
the answer is the third on which is y=-1/9-5
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