SOLUTION: Find the slope if it exists of the line containing the points (9,-3) and (9,-9)

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Question 1112201: Find the slope if it exists of the line containing the points (9,-3) and (9,-9)
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
slope = [ change in y ] / [ change in x ]
( 9,-3 )
( 9, -9 )
+m+=+%28+-3+-%28-9%29+%29+%2F+%28+9+-+9+%29+
+m+=+6%2F0+
The zero in the denominator says that the
slope is infinite.
Infinite slope means the line is vertical.