**Learning objectives**

- Interpret functions as vector fields in the plane
- Use Mathematica to survey basic linear vector fields: sources, sinks, circles, spirals
- Work with flow lines (stream lines) of a vector field

**Before class**

- Read Hughes-Hallett sections 7.3, 17.4
- Ponder Hughes-Hallett problems: 17.3: 5, 6, 7, 13, 17; 17.4: 4, 10, 15.
- Post to Piazza
- Write solutions to problems 17.1: 58 and 17.2: 38 to turn in at the beginning of class.
- Complete HW9 on WeBWork
- Remember to bring your laptop to class

**In class**

- Mathematica examples
- Draw vector fields and flow lines with Mathematica

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