SOLUTION: -4y+7=11 find the slope of the vertical or horizontal line

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Question 1112356: -4y+7=11 find the slope of the vertical or horizontal line
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+-4y+%2B+7+=+11+
+-4y+=+4+
+y+=+-1+
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No matter where you move along this
line, +y+ never changes. It is
always +-1+.
( 3, -1 ) and ( 12,706, -1 ) are both
points on this line.
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The only way this can happen is if
the line is horizontal, so the slope
is [ change in y ] / [ change in x ] and
[ change in y ] is always +0+,
so slope = +0+