Discussion:  All Topics 
Topic:  vertical measuring 
Related Item:  http://mathforum.org/mathtools/tool/211683/ 
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Subject:  RE: vertical measuring 
Author:  Jeff L 
Date:  Nov 13 2013 
with vertical measures when the concepts of negative numbers are introduced,
specifically something like temperature and tides.
Traditionally (I guess), on a vertical scale with positive and negative numbers,
the absolute value of the positive side of the scale increase as they go 'up'.
The absolute value of negative numbers decreases as they go 'up'.
3
2
1
0
1
2
3
I do not have any particular suggestions other than if the 'ruler' had the
numbers turned in respect to the axis of the ruler, (i.e.. a 'regular ruler'
turned sideways) it might provide an alternative.
 
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