Question

which of the following represents a function?
A.) x=|y|
B.) x^2+y^=49
C.) 7=2x^2-y
D.) x=[[y]]

Answer 1

To be a function for each value of x there is one and only one corresponding value of y.

Answer 2

so it should be betweeen A and D?

Answer 3

Well let's look at A.....If x equals say 3. then y can equal what?

Answer 4

3 could equal 1 or something

Answer 5

If you plug in 3 for x the equation will look like 3=|y|. So how could y =1?

Answer 6

so is there any difference between A and D?

Answer 7

3=|y|..what does |y| mean?

Answer 8

doesnt that mean absolute value and what ever is outside is either positive or negative?

Answer 9

it was C :/

Answer 10

Yes

Answer 11

what would happen if we switch the variable like y=|x|, y=[[x]] for A and D