I need help guys so bad

C.) 0

Step-by-step explanation:

(1/2 + 1/4 - 3/4)*6

1/2*6 . + . 1/4*6 . -  3/4*6

(3 + 1 1/2 - 4 1/2)

(4 1/2 - 4 1/2)

0

Regards!

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

i think it might be a but you might want a second opinion