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Data viz edit (#1087) 

* Update data-visualize.qmd

Describe a negative relationship between engine size and fuel efficiency.

* Update data-visualize.qmd

Change "higher mileage" to "higher fuel efficiency." Add a clarifying sentence afterwards.
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Kevin Perese 2022-09-12 16:44:05 -04:00 committed by GitHub
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@ -139,7 +139,7 @@ We will begin with the `<MAPPINGS>` component.
> "The greatest value of a picture is when it forces us to notice what we never expected to see." --- John Tukey
In the plot below, one group of points (highlighted in red) seems to fall outside of the linear trend.
These cars have a higher mileage than you might expect.
These cars have a higher fuel efficiency than you might expect. That is, they have a higher miles per gallon than other cars with similar engine sizes.
How can you explain these cars?
```{r}