With which kind of images should you save in gif format?

photograph-like images with lots of gradations of color
line drawings or pics with large areas of flat color

With which kind of images should you save in jpeg format?

photograph-like images with lots of gradations of color
line drawings or pics with large areas of flat color

using pixels of colors close together to approximate another color
loading an image partially and then redrawing to bring into focus (use for nonessential pics)

Interlacing is

using pixels of colors close together to approximate another color
loading an image partially and then redrawing to bring into focus (use for nonessential pics)

marking a color so that the background shows through
using blended edges, resulting in unnessarily larger file sizes

Anti-aliasing is

marking a color so that the background shows through
using blended edges, resulting in unnessarily larger file sizes

the maximum resolution needed for images for Web publishing
the total size of all combined files of a Web page for quick loading
these are colors common across platforms -- use these for a consistent appearance

72-85 dpi is

the maximum resolution needed for images for Web publishing
the total size of all combined files of a Web page for quick loading
these are colors common across platforms -- use these for a consistent appearance

What is the Netscape 216?

the maximum resolution needed for images for Web publishing
the total size of all combined files of a Web page for quick loading
these are colors common across platforms -- use these for a consistent appearance

use your own original creations or images clearly marked "in the public domain" or ask for permission first from the author to be safe from being sued
all things on the Internet are copyright-free