Tricks for remembering...
Zero Slope & No Slope!
If you end up with a zero in your fraction...
It's OK to have a zero on the top!
It will equal 0!
It's NOT ok to have zero on the bottom!
This is undefined (no slope)!
If you have a horizontal or a vertical line...
You can make a with the horizontal line!
These have ero slope!
You can make an with a vertical line!
These have o slope!
You guys are doing a wonderful job with slope!