Question

which of the following equations are functions and why
Y=-3x+8
$y {}^{2} = x$
$y = x {}^{2}$
$x {}^{2} + y {}^{2} = 25$

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Answer 1

Answer:

y = 3x + 8

and

${x}^{2} = y$

are functions as corresponding to every value of x, we get unique value of y or one one correspondence.

Answer 2

Answer:

this is correct................................