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## starfish33 3 years ago A line has a slope of -1 and contains the points (1, 2) and (2, y). The value of y is... Can you show me the steps to solve this...

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1. myininaya

$-1=\frac{y-2}{2-1} => -1=\frac{y-2}{1} =>-1=y-2 => -1+2=y => 1=y$

2. myininaya

i just used the formula for the slope

3. starfish33

thanks

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