bugfixing index

Author: trevorcampbell

source/inference.md

@@ -168,7 +168,7 @@ We can find the proportion of listings for each room type
 by using the `value_counts` function with the `normalize` parameter
 as we did in previous chapters.
 
-```{index} pandas.DataFrame; df[], count, len
+```{index} pandas.DataFrame; [], pandas.DataFrame; value_counts
 ```
 
 ```{code-cell} ipython3

source/regression2.md

@@ -150,6 +150,9 @@ Scatter plot of sale price versus size with line of best fit for subset of the S
 ```{index} straight line; equation
 ```
 
+```{index} see: line; straight line
+```
+
 The equation for the straight line is:
 
 $$\text{house sale price} = \beta_0 + \beta_1 \cdot (\text{house size}),$$