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

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 :) 

Ya i could just need to know what type of math