Function. Domain and Range HELP

Question

Function: f(x)=-4x-8        R:{-16,-28,-36,-40}

 

Find the domain 

Answer 1

To find the domain, set f(x) = each number given in the set notation for the range. For example, 

 

-4x - 8 = -16

-4x = -8

x = 2

 

I'll leave the other three for you to solve. Remember, approach each one the same way. Let me know if you have any questions. Thanks!