Which relation is a function?
question 3 options:

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

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

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

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

The correct answer would be C.

Step-by-step explanation:

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

A function doesn't let its x-coordinates repeat.  In the first option, 2 repeats.  In the second option, 1 repeats.  In the 4th option, 1 repeats.

Hope this helps! :)

honesty mood

step-by-step explanation:

sas (side angle side)

aa(angle angle)

sss(side side side)

sas you have to find two sides with an angle in between

aa you find two angles because it will always add up to 180

sss find all sides

step-by-step explanation: