when I'm given a line graph and then a question of

For what value(s) of x is f(x) = 4
and
For what value(s) of x is f(x) = -4

how do I determine this?

Also, how do I tell the domain and range?

1 answer

To determine the values of x for which f(x) = 4 and f(x) = -4, you would need to look at the line graph and find the points where the line intersects the y-axis at 4 and -4. The domain of the function is the set of all x-values for which the function is defined, and the range is the set of all y-values for which the function is defined.