For secp256k1 and in general for EC y^2= x^3+7 any prime orders, by coordinate values it will look like this:

[![enter image description here][1]][1]

[![enter image description here][2]][2]

[![enter image description here][4]][4]



[![enter image description here][3]][3]


  [1]: https://i.sstatic.net/lk39S.png
  [2]: https://i.sstatic.net/tamen.png
  [3]: https://i.sstatic.net/yPG7c.png
  [4]: https://i.sstatic.net/p4YFf.png