Will give brainliest once again Does this graph show a function? Explain how you know

Answer:
D
Step-by-step explanation:
In a function no X's can repeat which is what the vertical line test is. And in this case no X's repeat therefore, making it a function.
Answer:
D
Step-by-step explanation:
parabolas are functions
the graphed is a parabola
it passes the vertical line test.