look at the diagram, how do you know that y is not directly proportional to x.
![look at the diagram how do you know that y is not directly proportional to x class=](https://us-static.z-dn.net/files/dc0/2dbc7498982f10305f85c9a5b817fbc2.png)
Step-by-step explanation:
If y was directly proportional to x, the graph of y against x would pass through the origin (O).
Since the graph above does not show this, y is not directly proportional to x.