Question

Find the range of each functoin for the domain (-2, 1, 5)
f(x) = -4

Answer 1

Just replace f(x) as y and write out the equation, since they both represent the same thing.

y=-4 <-- this is going to create a line horizontally that passes through -4.

So no matter what x coordinate is being considered, the range will always be -4. You can try this out;

f(-2)=-4, f(1)=-4, f(5)= -4

Hope I helped :)