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They are proportional if a change in one of the quantities always and necessarily results in a proportional change in the other.
So if you think of a simple equation, x = 2y then the quantities are proportional. If you double y then x is necessarily also doubled. If you triple y then x is also tripled. If you halve y then x is halved and so forth.
However x = 2y + 1 is non proportional. This is because if, for example, you double y then x is increased but it is not exactly doubled and so the change is not in proportion. For example, in this equation, when y = 2 then x = 5. When y = 4 then x = 9. 9 is not the double of 5.
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When two plane figures have congruent angles and porportional sides they are?
... similar.
A proportion or fraction that compares two measurements of the same quantity?
this is Jeremy im improving this anser of " I don't know" its poiintless its where you wold cross multiply and if they eqall out they wold be porportional, if not its you gessed it not porportional. hope this helped you people. :)
Are four fifths porportional to sixteen twentieths?
Yes, they are equivalent.
What are ratios of equal quantities?
The ratio of two equal quantities is 1 .
An equation states that two quantities are what?
An equation states that the two quantities on each side of the equal sign are equal.
