Pre cal (trig equations ) HELP!

[Easymoney1135]

I know the answer is D but I want to know how to do it please explain

 

[skeeter]

an inverse function passes the horizontal line test

 

[Easymoney1135]

an inverse function passes the horizontal line test

Do you know how I would get D as the answer like the steps ?

 

[skeeter]

disregard my previous post

meant to say, an interval of the original function that passes the horizontal line test has an inverse

 

[Deleted member 4993]

View attachment 29771I know the answer is D but I want to know how to do it please explain

As suggested, this problem needs to be investigated graphically. Look at each given domain (A, B, C & D) and observe which one passes "horizontal" line test.

 

[Otis]

Look at each given domain ... which one passes "horizontal" line test

How do domains "pass" that test?