I need help on this question badly: "demonstrate the impact that file format, compression techniques, image resolution and color depth have on file size and image quality"
um just open photoshop and do "save as for web" and mess around with different save types. you will begin to notice to quality of the image decrease as the size of the file also decreases. the trick is to find a middle ground where the image isnt too ugly and it takes up a decent amount of space. hope that helps