How can you tell if an image is vector?

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Tags

1. #appear
2. #shades
3. #image
4. #edges
5. #larger
6. #screen
7. #appears
8. #vector
9. #various
10. #crisp
11. #enlarge
12. #blurry
13. #raster
14. #color
15. #solid
16. #graphic