Hi Susan,
To use Points To Line, you would need an integer field as the Line ID field to separate the resulting lines. If your slope values are unique for every line you need to create, you can try this:
- Use Add Field to add in integer field, say LineID.
- Use Calculate Field to get integer values from the slope values, something like "Int ( [Slope] * 100)" - it multiplies the Slope values by 100 and converts them to integers, e.g. 0.5 slope value will become 50.
- Use Points To Line tool with LineID as the Line ID field and the ID field as the Sort Field.
Does that work for you?