on-going quest to understand p-channel MOSFETs
There  is an error in the O.P. circuit.  It will not be able to turn off the LED, so the LED will be on all the time.  To turn off the P-channel MOSFET, you need to pull the Gate to Source.  The Source is always at +9V in your circuit, but the pullup R1 goes only to +5V (VCC).

A high side P-channel MOSFET switch often looks like this.



Q2 can be a small N-channel MOSFET or a small NPN transistor.



On the other hand, is there a reason for using a high side P-channel switch (as opposed to a low side N-channel switch)?  Are you making this setup just to understand P-channel MOSFETs better?