most_avg_time.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v3.json",
  "description": "A simple bar chart with embedded data.",
  "width": 600,
  "data": {
    "values": [{ "name": "Thursday, 6am", "time": 185.000000, "avg": 20.09 },
{ "name": "Sunday, 5am", "time":  87.000000, "avg": 20.09 },
{ "name": "Saturday, 5am", "time":  70.250000, "avg": 20.09 },
{ "name": "Friday, 5am", "time":  46.750000, "avg": 20.09 },
{ "name": "Wednesday,9pm", "time":  41.000000, "avg": 20.09 }]
  },
  "layer": [
   {
     "mark": "bar",
  "encoding": {
    "x": {
      "field": "name",
      "type": "ordinal",
      "title": "Weekday",
      "sort": { "field": "time"}
    },
    "y": {"field": "time", "type": "quantitative", "title": "avg. trip distance"}
  }},
  {
    "mark": "line",
  "encoding": {
    "x": {"field": "name", "type": "ordinal"},
    "y": {"field": "avg", "type": "quantitative"}
  }
  }
  ]
}