A linear scale is much more simple to use and provides accurate readings it also works faster than the non-linear scale . This scale does not take much work and has equal divisions.
In a linear scale, there is an equal amount between each mark; this is the normal kind of scale that is used in most everyday graphs/charts.
In a non-linear scale, the difference between each mark is not the same, for example each mark, although the same distance apart on the paper, represents twice the value of the previous mark. Two examples which are met regularly are logarithmic in nature: pH (acid/alkali scale - eg pH balanced shampoo) and dB (deci-Bel - relative loudness of sounds).
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Nonlinear scaling is a scaling where the difference between each major unit of measure is not the same. For example, see logarithmic scale.
There must be a linear scale on the axes, so the even marks must have a constant difference between them. Such usual differences are 1, 5, 10, 50, etc.
On a linear scale, if two pairs of points are the same distance apart, their magnitudes differ by the same amount. So if distance from point A to B is the same as the distance from point C to D, then the magnitude of B-A is the same as D-C. On a non-linear scale this does not apply. On a logarithmic scale, for example, equal distances, as above would imply that B/A = D/C
There is no difference between the long scale million and a short scale million. There is a difference between the billion in these two scales. The American use the short scale so 1 billion to them is 1,000,000,000 or 10^9. We used to use the long scale so 1 billion is 1,000,000,000,000 or 10^12. It should be noted that for simplicity reasons especially with currency the UK have switched to the short scale system as well.
if two polygons are similar, then the ratio of the length of 2 corresponding sides is called a scale factor