Question

What is the domain and range of {(1.3), (2,2), (3,1), (4,0), (5,-1)}?

Answer 1

Domain: {1, 2, 3, 4, 5}
Range: {-1, 0, 1, 2, 3}

Explanation:

The domain is the set of x-values.
The range is the set of y-values.

We see that all the x-values are 1, 2, 3, 4, 5.
We see that all the y-values are 3, 2, 1, 0, -1.

A set doesn't repeat itself, but neither do either of these lists, so we have our answer (where I ordered the y-values just for convenience; set order doesn't matter here):

Domain: {1, 2, 3, 4, 5}
Range: {-1, 0, 1, 2, 3}