Inverse functions and logs practice test

If f(x)=x+5, what is f^-1(x)?

• (x + 5)²

• x - 5

• (x + 5)^-1

• undefined

Tags

CCSS.HSF-BF.B.4A

What does it mean to find the inverse of a function?

• the x's and y's are switched
• the x's and y's are divided by 2
• the x's and y's are made negative
• the x's and y's are the same

Tags

CCSS.HSF-BF.B.4A

If f(x)=3x, what is f^-1(x)?

• x/3

• 3x²

• 3x + 3x

• 3x^-1

Tags

CCSS.HSF-BF.B.4A

Are the following inverses of each other?

• True
• False

Tags

CCSS.HSF-BF.B.4B

Which is f ^-1(x)?

• f ^-1(x) = 5x + 3

• f ^-1(x) = 5x - 3

• f ^-1(x) = 5x - 15

• f ^-1(x) = 1/5(x) + 3/5

Tags

CCSS.HSF-BF.B.4A

 $f\left(x\right)=5x+1$  
Find  $f^{-1}\left(x\right)$  

•  $\frac{x-5}{1}$  

•  $\frac{x}{5}-1$  

•  $x-\frac{1}{5}$  

•  $\frac{x-1}{5}$  

Tags

CCSS.HSF-BF.B.4A

 $f\left(x\right)=\frac{8x-3}{5}$  
Find  $f^{-1}\left(x\right)$  

•  $5\left(8x+3\right)$  

•  $\frac{5x}{8}+3$  

•  $\frac{5\left(x+3\right)}{8}$  

•  $\frac{5x+3}{8}$  

Tags

CCSS.HSF-BF.B.4A

Are these functions inverses?

• No
• Yes
• No way to tell

Tags

CCSS.HSF-BF.B.4B

Are the graphs inverses?

• yes

• no

Tags

CCSS.HSF-BF.B.4B

Are the graphs inverses?

• yes

• no

Tags

CCSS.HSF-BF.B.4B