Which statement about the graph is true?




1 ,The graph shows a proportional relationship because it is a line, and the difference between each point is the same.

2, The graph shows a proportional relationship because it is a line, and each x-value is a multiple of 2.

3 , The graph does not show a proportional relationship because each point written as a ratio gives a different value.

4, 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.