Coordinate geometry

12345678
Across
  1. 3. The axes divide a plane into 4
  2. 5. The point of intersection of the aes
  3. 7. The x coordinate is also called
  4. 8. The name of the system developed by René Déscartes
Down
  1. 1. The horizontal line is called
  2. 2. The y coordinate is also called
  3. 4. Plural of axis
  4. 6. The vertical line is called