diff --git a/Chapter-Instructions/Chapter_09_Instructions.qmd b/Chapter-Instructions/Chapter_09_Instructions.qmd
index a8ca0fb..fc95664 100644
--- a/Chapter-Instructions/Chapter_09_Instructions.qmd
+++ b/Chapter-Instructions/Chapter_09_Instructions.qmd
@@ -58,7 +58,7 @@ Since ggplot2 will only use six shapes at a time, by default, additional groups
 The second warning is related – there are 62 SUVs in the dataset and they’re not plotted.
 
 Similarly, we can map class to size or alpha aesthetics as well, which control the size and the transparency of the points, respectively.
-```{r explictly choose size and alpha}
+```{r explicitly choose size and alpha}
 #| eval: false
 # Left
 ggplot(mpg, aes(x = displ, y = hwy, size = class)) +
@@ -626,4 +626,4 @@ In practice, you rarely need to supply all seven parameters to make a graph beca
 
 ------------------------------------------------------------------------
 
-**NEXT UP:** [Chapter 10](https://github.com/UCSC-Treehouse/Essential-skills-for-Treehouse-computational-research/blob/main/Chapter-Instructions/Chapter_10_Instructions.md)
\ No newline at end of file
+**NEXT UP:** [Chapter 10](https://github.com/UCSC-Treehouse/Essential-skills-for-Treehouse-computational-research/blob/main/Chapter-Instructions/Chapter_10_Instructions.md)