Finding Composite and Inverse Functions · Exercise 16

Determine if the set of ordered pairs represents a function and if so, is the function one-to-one.

$\{\left(5,3\right),\left(4,2\right),\left(3,1\right),\left(2,0\right)$,
$\left(1,-1\right),\left(0,-2\right),\left(-1,-3\right)\}$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Intermediate Algebra 2e · §10.1 Finding Composite and Inverse Functions · Exercise 16