The graph shows a proportional relationship between the cost of carpet cleaning (y-axis) and the area of the carpet (x-axis).
The proportionality constant (y to x) is.
![The graph shows a proportional relationship between the cost of carpet cleaning yaxis and the area of the carpet xaxis The proportionality constant y to x is class=](https://us-static.z-dn.net/files/d20/2b62404a4450102dce204454a386ec44.png)