HELP ASAP: Is the following equation linear? If the equation is linear, convert it to standard form (ax+by=c)
9x^2-(3x+1)^2=y-
*at least help w steps on if linear or not, please :) if is why/how if not same lol!
Brainlest and thanks!
Many thanks!

-18 degrees is the answer : )

step-by-step explanation:

it's is b

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

answer 1 : option "c"

answer 2 : option "d"

answer 3 : option "b"

answer 4 : option "d"

answer 5 : option "b"

answer 6 : option "a"

answer 7 : option "c"

answer 8 : option "d"

answer 9 : option "c"

answer 10 : option "d"

answer 11 : option "c"

answer 12 option "b"

answer 13 option "c"

answer 14 option "c"

answer 15 option "d"

answer 16 option "a"

answer 17 option "b"

answer 18 option "c"

answer 19 option "a"

answer 20 option "a"

answer 21 option "c"

d