Is X squared = Y+2 A FUNCTION? Is Y squared= X+2 a function?

Answer 1

a function is an equation where for every x value, there is exactly one y value. y squared = x+2 is not a function because it has two y values for certian x values.

for example, with the equation:

y squared = x + 2,

plug in "2" for x

y squared = 2 + 2
y squared = 4
square root(y squared) = square root(4)
y = +/- 2

so there are two y values at x=2 which means it is not a function.

Answer 2

If you rewrite the first one as y = x^2 - 2, then you've got a function. You could also write it as f(x) = x^2 -2

Answer 3

Try graphing those equations by making a plotting chart.....and if they pass the vertical line test then they are functions..........or go to google and type in "online graphing calculators" and graph them....but first put them into y=mx+b

Answer 4

They are both functions.
You can rewrite them to look like they do in some textbooks:

f(y) = x2 - 2
f(x) = y2-2

Answer 5

the first one is. the second one isn't. Y cannot be squared, absolute valued (if that's a word, i don't know), or nonexistent and it still be a function.

everything else is dine and fandy.

Answer 6

they both are functions

Answer 7

No, it's an equation.

Answer 8

You tell us