Question

Which of the following relations is a function?
A. { (1, 2), (1, 3), (2, 8), (3, 9) }
B. { (1, 2), (2, 3), (3, 4), (4, 5) }
C. { (3, -1), (2, 3), (3, 4), (1, 7) }
D. { (3, 0), (4, -3), (6, 7), (4, 4) }

Answer 1

I going with B; y=x+1

Answer 2

are you sure???

Answer 3

One-to-One Function
with one value of x cant have more than one value of y

Answer 4

imm so confused m): @hba help me!!!!!!!!!

Answer 5

A function relates an input to an output.

Answer 6

still confused its a pretest so i have no clue what your talking about

Answer 7

take a look http://www.mathsisfun.com/sets/function.html

Answer 8

i still dont know what the answer is ):

Answer 9

The answer is B, be cause
A. { (1, 2), (1, 3), (2, 8), (3, 9) } (x=1 has more than 1 value of y (y=2 and y=3) so NOT A FUNCTION
B. { (1, 2), (2, 3), (3, 4), (4, 5) } FUNCTION
C. { (3, -1), (2, 3), (3, 4), (1, 7) } (x=3 has more than 1 value of y (y=-1 and y=4) so NOT A FUNCTION
D. { (3, 0), (4, -3), (6, 7), (4, 4) } (x41 has more than 1 value of y (y=-3 and y=4) so NOT A FUNCTION

Answer 10

still very confused .-. oh well

Answer 11

@meggy I am sorry lets start this.

Answer 12

here ( http://en.wikipedia.org/wiki/Function_(mathematics) )