To determine which equation describes the function shown in the mapping diagram, we need to analyze how the values from oval x are transformed to the values in oval y.
However, since I cannot see the image, I can't directly interpret the values or the arrows between the ovals. If you can provide the values in each oval or describe the relationships indicated by the arrows, I can help you identify the correct equation that describes that function.
Please provide the necessary details about the values in ovals x and y and how they are connected.