Algebra-2

1. Understand direct and inverse variation:

When a variable varies directly with a variable , it means is directly proportional to . Mathematically, it can be written as , where is the constant of proportionality.

 

When a variable varies inversely with a variable , it means is inversely proportional to , and the relationship is

 

 If a variable varies directly with and inversely with , the relationship is

 

2. Apply to the electric current problem:

Given that the electric current in a circuit varies directly with the voltage and inversely with the resistance .

The correct equation is , where

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