For my proportional symbols, I did have some issue with the negatives. The symbols were inversed so the negatives closer to zero had larger symbols than the ones further away. My solution was, once the negatives were isolated, I multiplied them by negative one to make them positive and the symbols made logical sense after that. To create a bivariate choropleth map, you'll need two variables. The range of those variables need to be broken down and portioned into classes. Once the two variables have classes assigned, those separate classes need to be combined and symbolized. A merging color scheme will be established to show the relationship between the two variables as they increase or decrease.
(My Jpeg wasn't uploading so I used a screenshot) I followed the lab instructions on getting my maps aligned. After that, I organized my two bar charts underneath their respective maps. I also added my scatterplot and used that to get my summary statistic. Then I added a light grey background to make the information stand out more. I felt it over the top to symbolize wealth with greens and death with blacks or red. If I was going for a more radical inflammatory approach, I would've opted for those changes. Instead, I tried to keep my colors as simple as the message "how much you make, increases the likelihood your child survives". I did use italic on my font to make it more eye-catching versus solid blocky text.