It's a bullshit calculation. It's putting federal minimum wage against the latest rents in urban areas, while maintaining the "you should only spend 30% of your income on rent" mantra.

In reality, people in urban areas earn more than federal minimum wage, they spend more than 30% of their income on rent and they don't necessarily live alone in one-bedroom apartments, which is always disproportionately expensive. They're also not working 2.5 jobs, unless it's part time jobs.