Question

Graph:-3x^2+12y^2=84

Domain & Range
Domain: all real numbers
Range: {y/y<=-sqrt 7 or y >= sqrt 7}

Answer 1

There are no restrictions for the domain.
Range, seems to be as you said. all numbers, but nothing between positive and negative sqrt7.
https://www.desmos.com/calculator/uqy5jcxkxm

Answer 2

you seem to be right:)

Answer 3

Okay, thanks!

Answer 4

Anytme.

Answer 5

please note that you graph is an hyperbola, whose equation is:
\[\frac{ x ^{2} }{ (2\sqrt{7} )^{2}}-\frac{ y ^{2} }{(\sqrt{7})^{2}}=-1\]

Answer 6

@-EtherealEbullience

Answer 7

Oh, thanks.

Answer 8

@-EtherealEbullience thanks!