Question

What is the domain of the function {(-1,-1),(0,1),(2,-1)}

a) (-1,1)
b) (-1,0,2)
c) (-1,0,1,2)
d) {(-1,-1),(0,1),(2,-1)}

Answer 1

`b) \quad(-1,0,2)`

Explanation:

The domain is the set of all input values for a function. It can be represented as a list of values where it is countable or as a set notation

Here there are only 3 ordered pairs. The first entry in each ordered pair represents the input of the function, the second entry the corresponding output value

Looking at the first entry in all three ordered pairs we get the domain as

`(-1, 0 , 2)`