Explain the following statement: "Pixels must be small to create the representation of a photographic image." Include in your answer the significance of the following three resolutions: 72 ppi, 150 ppi, and 300 ppi.

What will be an ideal response?

Pixels must be small to create the representation of a photographic image-you want to see the image, not the pixels. 300 ppi is considered a high resolution for any file that will be professionally printed. For a home desktop printer, 150 ppi is generally enough resolution for a good-looking print. For the web and other  "on-screen " graphics, the standard resolution is low-just 72 ppi.  "Hi-res" is an abbreviation for "high resolution," and generally speaking, a hi-res file pertains only to the world of printing. So when you think of hi-res, think of images-color or black-and-white-printing at a high quality, like in a magazine or a poster. This type of reproduction requires the industry standard of 300 pixels per inch.