Update 02b-graphics.qmd

images used in quizzes need to be named

Author: heike

part-wrangling/02b-graphics.qmd

@@ -211,7 +211,7 @@ However, it is also clear that there is considerable variation that is not expla
 
 We can extend this process a bit by adding in additional information from the dataset and mapping that information to an additional variable - for instance, we can color the points by the species of penguin.
 
-```{r}
+```{r penguins-quiz-scatter}
 ggplot(data = penguins, aes(x = body_mass_g, y = bill_length_mm, color = species)) + geom_point()
 ```