Answer :
Step-by-step explanation:
remember, y = f(x)
so, the question is really for what x is y = 1 ?
and what is the y-value for x = -1 ?
a)
when we imagine a horizontal line through y = 1, at what points (x-value) does this line cross the function graph ?
as we can see, at x = -2 and x = 2.
pick one for your answer.
b)
now we imagine a vertical line through x = -1.
at what point (y-value) does this line cross the function graph ?
as we can see, at y = 4.
f(-1) = 4
