Direct variation

Lessons

• 1.
  Identifying direct variations by table of values
  Do the following tables of values represent direct variation?
  
  
  
  
  

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• 2.
  Identifying direct variations
  Which of the following represent direct variation?
  
  A. $y$ = 2
  
  B. $y$ = 3.1$x$
  
  C. $y = - \frac{7x}{9}$
  
  D. $xy$ = 191
  
  E. $y$ = 8$x$ + 5
  

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• 3.
  Variable $y$ varies directly with $x$. Determine $m$ and $n$
  
  

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• 4.
  If $a$ varies directly as $b$, and $b$ = 4 when $a$ = 16, find $a$ when $b = \frac{3}{2}$

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• 5.
  If the volume of an object varies directly as the cube of its height, and the volume equals 40$ft^{3}$ when the height is 2$ft$, find the object's volume when its height equals $\frac{1}{3} ft$

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