Only about 1 percent of venture capital-backed startup founders are black, according to CB Insights data. Even fewer are black women or Latino. There's not a lot of age diversity and geographic diversity, and underrepresented founders don't always have access to the networks or training programs that can help them get startup funding. Mandela Dixon is a former public school teacher and startup founder, and she was a mentor for entrepreneurs at the VC firm Kapor Capital. About a year ago, she created Founder Gym, which is an online-only training program for underrepresented, would-be startup founders. Host Molly Wood talked with her at the AfroTech conference last week in San Francisco.