Caption: A linear-scale plot of 4 simple function behaviors.

The 4 functions:

1. y = constant.
2. y = Cx , where C is a constant. This is a straight line passing through the origin.
3. y = C/x , where C is a constant. This is an inverse linear function.
4. y = C/x**2 , where C is a constant. This is an inverse-square-law function.

Note that the inverse linear function and inverse-square-law function have mathematical singularities at the origin. In this case, the mathematical singularities are infinities: i.e., as the x → 0, the y → ∞.

Credit/Permission: © David Jeffery, 2005 / Own work.
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