Alg 1: 63 and 64 Elimination and Inverse Variation

Alg 1: 63 and 64 Elimination and Inverse Variation

Multiple Choice

 $4y=x$  

• direct variation

• inverse variation

• neither

Remember:

 $4y=x$  

 $\frac{4y}{4}=\frac{x}{4}$  
 $y=\frac{x}{4}$  
which is the same as  $y=\frac{1}{4}x$  

Multiple Choice

 $3xy=9$  

• direct variation

• inverse variation

• neither

 $3xy=9$  

 $\frac{3xy}{3x}=\frac{9}{3x}$  divide both sides by 3x
 $y=\frac{9}{3x}$  
 $y=\frac{3}{x}$  inverse variation