1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 +1
answer i will mark you the brainliest

19

Step-by-step explanation:

1+1=2 1+1=2 1+1=2 1+1=2 1+1=2 1+1=2 1+1=2 1+1=2 1+1=2

2+2+2+2+2+2+2+2+2=18

18+1=19              The answer is 19.

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