Area of a region bounded by modulus graphs

CAT has tested this idea 5 times across 5 papers, from 2017 to 2023. Solve one, and the others are the same method with different numbers or wording, which is why repeated concepts are the most efficient thing to practise.

Question	What it asks	Answer
CAT 2017 Slot 1 · QA Q15	\|x\| + \|y\| = 2 is a square	C
CAT 2019 Slot 1 · QA Q28	\|x\| + \|y\| ≤ 2 with \|x\| ≥ 1	2
CAT 2020 Slot 1 · QA Q16	\|x\| − y ≤ 1 between y = 0 and y = 1	3
CAT 2020 Slot 3 · QA Q5	y = \|x − 2\| + 4, axes and x = 2	D
CAT 2023 Slot 2 · QA Q19	\|x − y\| − \|x − 5\| = 2 with y-axis and x = 5	45

Part of Coordinate Geometry (16 questions since 2017).