This Graph Paper generator will produce a blank page of Vertical Number Lines for various types of scales.
You may enter whole numbers, negative numbers or decimals numbers for the starting and ending numbers. You may select increments that are whole integers or fractions.
If you select a large range with a very small increment you will not be able to read the graph under some cases. Twenty five points with labeling is probably the most you will be able to read. You can produce number lines with more than 25 points just label the zero, start and end numbers.