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If we've got the picture of a
critter (i.e. the graph), there's an easy way to tell if it's a
function or not. It's
called THE VERTICAL LINE TEST:
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If
you can draw a vertical line anywhere on
a graph so that it hits the graph in more
than one spot, then the graph is NOT a function. |
Check out Standard Parabola Guy:
 |
|
No matter where we drop a
vertical line, it only hits the parabola in one spot. |
So, Standard Parabola
Guy is a function!
Continued on the
next
page
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and distribution and/or downloading of these lessons is strictly
prohibited. |
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