Question

Determine whether the following relation is a function. |9x| = |7y| I say no?

Answer 1

of course it is a function.

Answer 2

|9x|-|7y| = 0

Answer 3

Lol dhat do you know the definition of a function?

Answer 4

whoops my mistake. it is a line on a graph.

Answer 5

or lines on a graph.

Answer 6

Lines on graphs can be functions. And it isn't a line on a graph. Try again. (it is not a function)

Answer 7

Yes, well done - values are all mapped to two positions -> not a function.

Answer 8

can anyone help me?

Answer 9

you are right.

Answer 10

I meant lines on a graph where x and y are independent of each other.

Answer 11

yes bkclingan85 post your problem on message board.

Answer 12

wait how is this not a function? if you divide by 7 (to get the values you x to equal y by itself) then you get the absolute value of 9/7 x equals the absolute value of y. that means that its just and absolute value graph which IS a function

Answer 13

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

Answer 14

No, as newton said, for x = say 7, both y= +9 and y = -9 solve the equation. thus, one value of x maps onto two values of y. Therefore this is not a function.

Answer 15

since, with an input value, x, we cannot determine the output, y, this is not a function.

Answer 16

oh i see now