Make a plot with the relative positions of the start stations vis-a-vis the end station, when that end station is 336. Show the end station itself as well. Your plot could look like this: (see tutorial)

vega-lite_exercise 2

{
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "description": "Assignment 2nd graph",
  "width": 500,
  "height": 500,
  "padding": 5,

  "data": { 
    "url": "https://raw.githubusercontent.com/vda-lab/vda-lab.github.io/master/assets/station_366.json"
  },

  "transform": [
    {"filter": {"field": "endstation_id", "equal": 336}}
  ],

  "layer":[
    {
      "mark": {"type": "circle", "opacity": 0.3},
      "encoding": {
        "x": {
          "field": "startstation_longitude", 
          "scale": {"domain": [-74.06,-73.90]},
          "type": "quantitative"
        },
        "y": {
          "field": "startstation_latitude", 
          "scale": {"domain": [40.82,40.64]},
          "type": "quantitative"
        }
      }
    },
    {
      "mark": "circle",
      "encoding": {
        "x": {
          "field": "endstation_longitude",
          "scale": {"domain": [-74.06,-73.90]},
          "type": "quantitative"
        },
        "y": {
          "field": "endstation_latitude",
          "scale": {"domain": [40.82,40.64]},
          "type": "quantitative"
        },
        "color": {"value":"red"},
        "size": {"value": 250},
        "opacity":{"value":0.01}
      }
    }
  ]

}