Will mark of the following relations is not a function?
a (-5, 4)
(4,2)
(6, 1)
(-7,5)

b(-7,4)
(4,3)
(-5, 1)
(6,2)

c(4,4)
(-5,2)
(4,1)
(-7,2)

d(6,4)
(-5,2)
(4, 1)
(-7.2

The third (C) option is the answer.

Because 4 is repeating in x coordinate,

that is called Domain.

It's allowed to be repeated in y coordinates,

that is called Range.

Good luck!

Intelligent Muslim,

From Uzbekistan.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0