Answer:

Step-by-step explanation:

Answer:
It is not a function
Step-by-step explanation:
The plot shows (1, 1) and (1, 3) are both defined by the relation. It does not pass the "vertical line test", which requires the relation be single-valued everywhere.
Answer:
D
Step-by-step explanation:
The rest you can elimate because of obvious inferring and reasoning so process of elimination
Answer:
i believe its 2
Step-by-step explanation:
definition is valid since center is exactly 1radius away from any point on the outersurface.
other figures do not fit this defn