Hi Angelica_70
The points you receive or lose depend on your opponent's rating. 

If you beat someone with a higher score than you, you'll get more points than
if you beat someone with a lower score. 
And if you lose to someone who has less points than you,
you will lose more points than if you had played against a stronger player.

For more information have a look at FlyOrDie's rating table:  

https://www.flyordie.com/games/help/rating_system.html

Kind regards,
John Stewart