Prompt What is the formula for NDVI?

Choices (one per line; prefix correct one with * ) * (NIR − Red) / (NIR + Red) NIR / Red (Red − NIR) / (Red + NIR) (NIR + Red) / (NIR − Red)

Plain English answer (default view) — what you'd actually write on the test

🔬 Technical version / model bullets (revealed on click) — one bullet per line NDVI = (NIR − Red) / (NIR + Red). Range −1 to +1.

💡 Mnemonic / memory aid (shown on hover) NIR comes FIRST (it's bigger for vegetation). Difference on top, sum on bottom. NIR/Red is the Simple Ratio — a different index.