When a barometer is rising air pressure is what?

Question

When a barometer is rising air pressure is what?

Answer 1

Increasing.

If you mean a mercury barometer, the air presses down more heavily on the mercury in the bottom, forcing the column to rise.

Answer 2

Increasing. Getting more dense. This means good weather is on the way.

Answer 3

Air pressure is increasing, that also means that the sky is getting clearer.

Answer 4

Technically a barometer is just an instrument. You can make a barometer "rise" by picking it up off the table. If you carry a barometer up a hill the instrument will "rise" but the indicated air pressure will be lower than at the bottom of the hill.

Sorry if all this is obvious, but I wasn't sure if this was a trick question.