Which of the sets of ordered pairs represents a function? (5 points)

a = {(2, −2), (5, −5), (−2, 2), (−5, 5)}
b = {(4, 2), (4, −2), (9, 3), (9, −3)}

group of answer choices

only b

both a and b

only a

neither a nor b

41/2 - 1 1/3 what is the answer as a fraction?

With this one. will mark brainliest

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate. in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30