Add x and y to aes(), addresses #1159

quarto/fuel-economy.qmd

@@ -18,7 +18,7 @@ class <- mpg |> filter(class == params$my_class)
 ```{r}
 #| message: false
 
-ggplot(class, aes(displ, hwy)) + 
+ggplot(class, aes(x = displ, y = hwy)) + 
   geom_point() + 
   geom_smooth(se = FALSE)
 ```