A. READINGS/DISCUSSIONS ACTIVITY: FUNCTION OR NOT? Mark ( v ) if the given relation is a function and (x) if not. Write the answer before each number. 1. у 2. 3. у X x X _4. y 5. y = 2x - 1 6. y2 = 2x In the previous lesson, we have learned that relations can be represented by a: (1) nd (5) ution ordered nire 1 table. (marin die marsh,​