Question

Which equation is the inverse of y = 100 – x2?

y= + or - sqrt 100-x
y= 10 + or - sqrt x
y= 100 + or - sqrt x
y = + or - sqrt x - 100

Answer 1

y=100-x^2
x=100-y^2
100-x=y^2
(+/- sqrrt 100-x)=y