Explanation:
The graph of a function is the set os all the points of a function plotted in a graph. You can identify the graph of a function by doing the vertical line test. All you have to do is draw vertical lines (line parallel to the y axis) for each x value. If the vertical line intersects the x value more then once, the graph is not a function because a function only has one output for each input. If the vertical line intersects x value once, the graph is a function.
Graph 1:
Dose not represent a function.
Graph 2:
It is not a function.
Graph 3:
Is not a function.
Graph 4:
It is not a function.
Graph5:
It represent a function.
Graph 6:
It is not a function.
