9.1-9.2 Variation Practice

What type of variation is this? $y=2x$  

• Direct

• Inverse

• Joint

• None

 $y=\frac{x}{5}$  

What type of variation is this?

• Direct

• Inverse

• Joint

• None

 $y=\frac{12}{x}$  

What type of variation is this?

• Direct

• Inverse

• Joint

• None

 $D=\frac{3}{4}gh$  

What type of variation is this?

• Direct

• Inverse

• Joint

• None

Write an equation for- b varies directly with the square of t

• $k=bt^2$

• $b=kt^2$

• $b=kt$

• $b=\frac{k}{t^2}$

Write an equation for- y varies inversely with the square root of r

•  $y=k\sqrt{r}$  

•  $y=\frac{k}{r}$  

•  $y=\frac{k}{\sqrt{r}}$  

•  $y=\frac{k}{r^2}$  

Write an equation for - r varies jointly with t and u

• $y=ktu$

• $y=\frac{kt}{u}$

• $y=kt$

• $y=ktu^2$

Write an equation for - m varies directly with the square of n and inversely to p

• $m=knp$

• $m=\frac{kn}{p}$

• $m=kn^2p$

• $m=\frac{kn^2}{p}$