when i see you smiling, i feel great, when I see you sad, i can't hide my tears. you are my happiness, and at the same time, you are my sadness too. i can't spend a single day without you, i love you so much, person reading this. i am so crazy about you because i love you more than everything.

points

Step-by-step explanation:

Aww this is so sweet! I think it is very well written, as well! <3 this just made my day better, so thank you! Have a great day!

Step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

irrational, cannot