Which relation is a function? {(1, 2); (2, 3); (3, 4); (1, 5)}

{(1, 2); (1, 3); (3, 2); (4, 2)}

{(1, 2); (2, 5); (3, 2); (4, 5)}

{(1, 2); (2, 3); (3, 4); (2, 5)}

the third relation: {(1, 2); (2, 5); (3, 2); (4, 5)}

Step-by-step explanation:

relations can only be a function if the input/x don't repeat at all.

its ok if the output/y repeat though!

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.

question is incomplete.