How is resolution defined for a digital image?

• A. The number of colors in the image
• B. The physical size of the display
• C. The density of pixels, calculated as width multiplied by height
• D. The total brightness of all pixels

Answer: (C)

Resolution is about how much detail an image contains, which comes from how many individual pixels the image is made of. For a digital image, you find this by multiplying its width by its height, giving the total pixel count. More pixels means more detail and a sharper look when viewed or printed. So the density of pixels across the image area is captured by width times height. The number of colors describes color depth, not resolution; the physical size of the display changes how large the image appears but not the inherent pixel count; and brightness relates to how bright the image is, not how many pixels it contains.