Respuesta :

Answer:

draw a strait line and if it doesn't touch another dot it is a function

Step-by-step explanation:

Answer: Vertical line test

Step-by-step explanation:

Look at one of the graphs you have a question about. Then take a vertical line and place it on the graph. If the graph is a function, then no matter where on the graph you place the vertical line, the graph should only cross the vertical line once.

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