Answer:
Step-by-step explanation:
x² + y² = 81
x + y = √81
x + y = 9
x ≥ 9
y ≤ 9
4 because none of the dots are on the same line in that one. To figure out if a problem is a function you can do the pencil test and just go across the graph and if the dots are on the same line they wouldn't be a function. I'm not good at explaining but you could look it up and it'll help you more but the answer to this is 4.
Can you show a picture of the table please
X=24.20-3/10
x=24 2/10-3/10
x=23 9/10 or x=23.9