Help me please i give points and brainlest if correct. 1+1=

Is each relation a function? if so, state whether it is one-to-one or many-to-one. 3. (-4,7), (-3,5), (1,4), (3,-8), (5,-11) 4. (-4,8), (-2,4), (0,1), (2,4), (4,8) 5. (-2, 1), (-2,3), (0,-3), (1,4), (3,1)

Need on this geometry question. explain how you did it.

Which number completes the inequality? 2/3 < _ < 7/9