My data is about real estate lots: area and price. The data is not sorted. How can I create a chart so that I can see the correlation between area and price?

For example for:

```
500 1,000,000
450 900,000
650 1,500,000
450 800,000
```

I'd like to see a line where 450 is first with values 900,000 and 800,00, then 500 then 650