Is the following a graph of a function yes or no why

Answer:
No
Step-by-step explanation:
Here is a trick... To use the vertical line test, take a ruler or other straight edge and draw a line parallel to the y-axis for any chosen value of x. If the vertical line you drew intersects the graph more than once for any value of x then the graph is not the graph of a function.
Your graph has an S and the line would go through it 2 times.