Section 6.1  Question: 
Which of the following is the inverse function of f (x) = 2x + 5? 

Quiz 6.8 
(x – 5)/2 –2(x – 5) –2x – 5 x/2 – 5 

Variation: 
Which of the following is the inverse function of f (x) = –x/3 – 5? 

x/3 + 5 (x + 5)/3 –3(x + 5) –3x + 5 