Modeling real-world phenomena (costs, speeds, conversions) using linear equations — IITM BS previous year questions

Modeling real-world phenomena (costs, speeds, conversions) using linear equations is part of Linear Applications & Models, Week 2 in Mathematics 1. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.