Answer:
The last graph which lies on the x-axis best represents a quadratic function that has only one solution where y = 0
Explanation:
y = 0 where it has no value or when the graph touches x-axis.
In this case, the last graph touches the x-axis one time. Meaning,
y = 0 for at least one value of x.
On the graph, the function is represented as
y = ( x - 4 )²
And if we plug in 4 for x, we get,
x = 4
y = ( 4 - 4 )²
y = 0
This will not work for any other value, therefore, this is the best graph which represents a quadratic function that has only one solution where y = 0