diff --git a/quarto/precalc/vectors.qmd b/quarto/precalc/vectors.qmd
index f5d0ada..bdf2ec1 100644
--- a/quarto/precalc/vectors.qmd
+++ b/quarto/precalc/vectors.qmd
@@ -169,8 +169,8 @@ ImageFile(imgfile, caption)
 ## vector_subtraction_image
 
 p0 = [0,0]
-a1 = [4,1]
-b1 = [-2,2]
+a1 = [-2,2]
+b1 = [4,1]
 
 plt = plot(legend=false, size=fig_size)
 arrow!(p0, a1, color="blue")