diff --git a/04-pca-biplot.qmd b/04-pca-biplot.qmd
index 297c571..f7e79da 100644
--- a/04-pca-biplot.qmd
+++ b/04-pca-biplot.qmd
@@ -1762,7 +1762,7 @@ a_i =
      \\
     \tan^{-1} (v_{i2}/v_{i1}) + \pi, & \text{otherwise.}
   \end{cases}     
-$$ {eq-angle-AOE}
+$$ {#eq-angle-AOE}
 
 In @eq-angle-AOE $\tan^{-1}(x)$ is read as "the angle whose tangent is $x$",
 and so the angles are determined by the tangent ratios "opposite" / "adjacent" = $v_{i2} / v_{i1}$
diff --git a/10-mlm-review.qmd b/10-mlm-review.qmd
index 7567051..50f8f9c 100644
--- a/10-mlm-review.qmd
+++ b/10-mlm-review.qmd
@@ -875,7 +875,7 @@ so the effect of one factor varies with the levels of another factor ...
 In @sec-multivariate_plots we examined the Palmer penguins data graphically,
 using a mosaic plot (@fig-peng-mosaic) of the frequencies of the three
 factors, `species`, `island` and `sex` and then `ggpairs()` scatterplot
-matrix (@fig-peng-ggpairs).
+matrix (@fig-peng-ggpairs1).
 
 
 ## MRA $\rightarrow$ MMRA