SOLUTION: A line has a slope of -1 and passes through the points 4,2,3and y.What it's the value of y.

Algebra ->  Points-lines-and-rays -> SOLUTION: A line has a slope of -1 and passes through the points 4,2,3and y.What it's the value of y.       Log On


   

Question 830240: A line has a slope of -1 and passes through the points 4,2,3and y.What it's the value of y.
Answer by jim_thompson5910(35256) About Me  (Show Source):
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A line has a slope of -1 and passes through the points 4,2,3and y.What it's the value of y.

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m+=+%28y%5B2%5D+-+y%5B1%5D%29%2F%28x%5B2%5D+-+x%5B1%5D%29

-1+=+%28y-2%29%2F%283-4%29

-1+=+%28y-2%29%2F%28-1%29

-1%2A%28-1%29+=+y-2

1+=+y-2

1%2B2+=+y

3+=+y

y+=+3