I was hired by Zumper to visualize monthly rent data in a format that - with the exception of an interactive map - allows non-technical staff to quickly update and export graphs as PNG files. We determined a linked Excel workbook would be easiest - the first two charts displayed below are exports from the xlsx workbook I created (Excel charts don't have to look gross!!). I made the interactive map at the bottom of the page using d3. I provided the Zumper team with a script that put their monthly data (which they receive as an xlsx file) in a d3-friendly format that they can copy&paste into the code.
Relative median rent for a 1 bdrm over time - four most expensive cities
September 2015 median rent - twenty-five most expensive cities
September 2015 median rent for a 1 bdrm - fifty most expensive cities