Question

4. Which of the following sets of ordered pairs is a function?

a. {(-3, -2), (-1, 3), (0, -2), (3, 4)}
b. {(0, 1), (3, 2), (5,-3), (0, 2)}
c. {(-7, -7) (-2,5),(-1, 6).(-2,-5)}
d. {(-4,-7), (-9,5), (4, -2), (-9, 0)}

Answer 1

a

Explanation:

Thing that x = a kid and y = it's biological mother

To be a function you need for each x to have only one y !

a. {(x= -3, y = -2), (x= -1, y= 3), (x=0, y= -2), (x= 3, y= 4)} Is a Function

b. {(x= 0, y= 1), (x= 3, y= 2), (x= 5, y= -3), (x= 0, y= 2)} Not a Function because kid x=0 has two biological mothers y=1 and y=2.

c. {(x= -7, y= -7) (x= -2, y= 5),(x= -1, y= 6).(x= -2, y= -5)}Not a Function because kid x= -2 has two biological mothers y= 5 and y= -5

d. {(x= -4, y= -7), (x= -9, y= 5), (x= 4, y= -2), (x= -9, y= 0)} Not a Function because kid x= -9 has two biological mothers y= 5 , and y= 0