Answer: B
Step-by-step explanation: F function is a relation in which each x-term corresponds to exactly one y-term.
The first image would not represent a function because each x-term does not have exactly one y-term. We can say this by using the vertical line test. The vertical line test says that if we can draw a vertical line that passes through more than one point, then the relation is not a function. Since we can draw a vertical line that passes through 2 points in the first image, this is not a function.
The second image would represent a function because each x-term has exactly one corresponding y-term. We would use the vertical line test to check.
The second image would not represent a function because each x-term does not have exactly one y-term. We can say this by using the vertical line test. The vertical line test says that if we can draw a vertical line that passes through more than one point, then the relation is not a function. Since we can draw a vertical line that passes through 2 points in the first image, this is not a function.
The mapping diagram in the last image would not represent a function because the x-term, -5 has two y-terms. Remember, a function cannot have more than 1 y-term if their different numbers.