Question

True or false? y=x^2 - 1 defines y as a function of x

Answer 1

true

Explanation:

it equals to

x1= -1

and

x2= 1

Answer 2

Explanation:

y=x²-1 is not a function for every value of y , x has more than one value

ex: if x=-1 , y=(-1)²-1 then y=0

if x=1 then y=0