No. To test whether a graph is a function or not you do the vertical line test where if a vertical line touches more than one point it is not a function
Answer:
HL theorem
Step-by-step explanation:
The first one is not a function due to the rule that there can not be more than one x, such as there is a repeated number 1 , 2 , 1 , 4 There should not be two
x = 1 terms.
Same the same rule applies to the second option as well as the last.
Your answer is C. or the third option
x= 6, 5, 4, 1
y=6, 4, 6, 2
Hope this Helps
