I want to visualize data by plotting distplot.

I have python code like below, but I don't understand how to calculate y-axis

Why x=2 corresponds to y=0.3, x=1 corresponds to y=0.6?
Can someone help me with the calculation formula?

```
import seaborn as sns
l = [1,3,2,1,3]
sns.distplot(l, kde=True, bins=3)

```

[![enter image description here](https://i.stack.imgur.com/2n1C6.png)](https://i.stack.imgur.com/2n1C6.png)