Observe the graph:

The graph is continuous and there is no holes and sharp corners.

Therefore, It is a polynomial function graph.

Real zeros are $\"\"$ -intercepts of the graph.

The curve touches the $\"\"$ -axis at $\"\"$ and $\"\"$ .

Real zeros are at $\"\"$ and $\"\"$ .

Since the graph has three turning points, the degree of the function is at least $\"\"$ .

$\"\"$

Could be; real zeros are at $\"\"$ and $\"\"$ ; Least degree is $\"\"$ .