Which statement about the graph is true?

On a coordinate plane, a line goes through points (0, 2), (2, 3), (4, 4), (6, 5).
The graph shows a proportional relationship because it is a line, and the difference between each point is the same.
The graph shows a proportional relationship because it is a line, and each x-value is a multiple of 2.
The graph does not show a proportional relationship because each point written as a ratio gives a different value.
The graph does not show a proportional relationship because a line that increases by 1 in the y-value cannot have a constant of proportionality.
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