Which relation is a function?

i. {(2, 4), (–1, 7), (3, 0), (5, 4)}
ii. {(–3, 6), (–3, 6), (8, 6), (8, 10)}
iii. {(4, 1), (–2, 5), (–8, 3), (4, 6)}

a. ii only

b. i only

c. i and ii

d. ii and iii

The production line where you work can assemble 5 appliers every 30 minutes at this rate how long should it take the line to assemble 125 amplifiers

Aline parallel to a triangle's side splits ab into lengths of x - 5 and x + 2. the other side, ac, is split into lengths of x and x + 12. what is the length of ac? a) 12 b) 24 c) 36 d)

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?