diff --git a/numbers.qmd b/numbers.qmd
index 1cb3c62..1fee232 100644
--- a/numbers.qmd
+++ b/numbers.qmd
@@ -256,7 +256,7 @@ flights |>
   group_by(hour = sched_dep_time %/% 100) |> 
   summarize(prop_cancelled = mean(is.na(dep_time)), n = n()) |> 
   filter(hour > 1) |> 
-  ggplot(aes(hour, prop_cancelled)) +
+  ggplot(aes(x = hour, y = prop_cancelled)) +
   geom_line(color = "grey50") + 
   geom_point(aes(size = n))
 ```
@@ -281,14 +281,14 @@ money <- tibble(
 If you plot this data, you'll get an exponential curve showing how your money grows year by year at an interest rate of 1.05:
 
 ```{r}
-ggplot(money, aes(year, money)) +
+ggplot(money, aes(x = year, y = money)) +
   geom_line()
 ```
 
 Log transforming the y-axis gives a straight line:
 
 ```{r}
-ggplot(money, aes(year, money)) +
+ggplot(money, aes(x = year, y = money)) +
   geom_line() + 
   scale_y_log10()
 ```