Prompt Who is credited with the first true vegetation index (Simple Ratio)?

Choices (one per line; prefix correct one with * ) * Cohen (1991) Rouse et al. (1974) Anderson (1976) Hord (1982)

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

🔬 Technical version / model bullets (revealed on click) — one bullet per line SR = NIR / Red — Cohen (1991).

💡 Mnemonic / memory aid (shown on hover) Cohen = SR (first VI). Rouse = NDVI (1974). Anderson = LULC classes (1976). Hord = Bayesian decision rule (1982). Don't mix these four.