If you look at the coordinates given
we can see that the positions given both lie on the same meridian (060°15'W).
Then comparing latitudes you'll notice that HO is 2° North
of the YYR VOR.
This gives us a number to apply
variation to - 000°. For the variation we are given two different numbers, one
at the VOR and one at the aircrafts present position. When dealing with VORs,
variation is applied at the VOR and in this case it is 28W (remembering
Variation West Magnetic Best).
So - 000°+28 = 028°
The aircraft is located on the 028°
Radial from the YYR VOR.