UPSKILL MATH PLUS

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As one amount increases, another amount increases at the same rate or as one amount decreases, and another amount decreases at the same rate is known as direct proportional.
The symbol for "directly proportional" is α.
Example:
You are paid  60 an hour. How much you earn is direct proportional to how many hours you work.
Work more hours, get more pay; in direct proportion. 
This could be written:
 
Earnings α Hours worked
 
If you work for 1 hour, you get paid 10.
If you work for 2 hours, you get paid 20.
If you work for 9 hours, you get paid 90.
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