Inverse Variation

Given that y varies inversely with x, use the values specified to write an inverse equation relating y to x.

x=5, y=3

• 

  $y=\frac{15}{x}$

• $y=\frac{-15}{x}$

• $y=\frac{-5}{3x}$

• $y=\frac{5}{3x}$

Use the equation

 $y=\frac{15}{x}$  to find x when y = -3

• x = 5

• x = -5

•  $x=\frac{-1}{5}$  

•  $x=\frac{1}{5}$  

Given that y varies inversely with x, use the values specified to write an inverse equation relating y to x.

x=-7, y = 6

• $y=\frac{48}{x}$

• $y=-\frac{48}{x}$

• $y=-\frac{42}{x}$

• $y=\frac{42}{x}$

Use the equation

 $y=-\frac{42}{x}$  find y, when x = 14

• y = 3

•  $y=\frac{1}{3}$  

•  $y=-\frac{1}{3}$  

• y = -3

Which of the following equations represents inverse variation?

• $y=6x+4$

• $y=\frac{13}{x}$

• $y=\frac{x}{16}$

• $y=x^2+3x-6$