vector vs. pixel
Vector-based graphics are defined by mathematical equations. They are scalable to any size and can print at an optimal quality at all times. They are constructed from lines, shapes, and curves.
Pixel-based or raster-based images. The files created with pixel-based images can represent all variations of color and are able to produce continuous tone images. They cannot print at an optimal quality at all times and need a resolution of 300 to be printed at a good quality. They also need a resolution of 72 to be displayed on the internet.
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