Write the range of H using set notation

Question

The function h is defined as follows for the domain given.

h(x)=2-2x

 

domain {-1,0,1,2}

 

Write the range of H using set notation

Answer 1

Julia,

The domain is the set of the x values that they are putting into the function. The range is the set of all the y values that are produced when those x values are used.  So what you need to do is put those x values in and see what y is.  The y's you get will be the range of the function.

So, for example, when you put in x = -1, you get

h(x) = 2 -2(-1) = 2 + 2 = 4.  Do the same with all numbers listed for the domain and you have the range.  List them with the set brackets around them.