Answer:
For sure the third one. I think the 1st one too.
Happy learning!
Answer:
The first and the third one. The second and the fourth one are incorrect because y is increasing fast while x is increasing slowly. I know this because the graph is steeper. If we assume that the x-axis represents time then more is being done in less time and that is not proportional. In a proportional graph, as x will increase a little bit, so will y. Hope this helps :)