Is this the correct way to use the ....? (If you think there is only one way)
Is this a correct way to use the ...? ( If you think there are one or more ways to use this expression, and giving one)
Are these correct ways to use the ....? (If you think there are more than one way, and giving examples)
Answer. Yes, you’ve given two correct examples of one way to use this phrasal verb, but there are others as well