Inverse Functions

The inverse of the function f(x) is written as ...

• f ^-1(x)

• f ²(x)

• f ¹(x)

• f (x) ^-1

Which of the following is NOT TRUE about inverse functions?

• Inverse functions are reflections of each other over the line y = x.

• You find the inverse by switching x and y in the equation.

• The domain of a function always becomes the domain of its inverse.

• To have an inverse a function must pass the horizontal line test.

When finding the inverse of a relation, 
1st you replace f(x) with y
2nd switch the x's and y's
What do you do next?

• solve for y
• replace y with f^-1(x)
• solve for x
• find the greatest common factor

Is the inverse function found correctly?

• yes
• no

Was the inverse function found correctly?

• no

• yes

TRUE or FALSE
If f is an invertible function and f(a) = b, then f^-1(b) = a.

• TRUE
• FALSE

If f^-1(-25) = 7 then what is f(7) = 

• 25
• 7
• No enough information. 
• -25

Determine f^-1(2) given the following information about an invertible function, f(x)
f(1) = -3
f(2) = -2
f(-1) = 2
f(3) = -1

• 1
• -1
• 2
• -2

Which is the inverse of the table?

• 
• 
• 
• 

What is the inverse of the given coordinates: (1, 2) (3, 8) (-3, 6)

• (1, 2) (3, 8) (-3, 6)
• (1, 2) (8, 3) (-3, 6)
• (-1, -2) (-3, -8) (3, -6)
• (2, 1) (8, 3) (6, -3)