Finding Composite and Inverse Functions · Example 3

For each set of ordered pairs, determine if it represents a function and, if so, if the function is one-to-one.
ⓐ $\left\{\left(-3,27\right),\left(-2,8\right),\left(-1,1\right),\left(0,0\right),\left(1,1\right),\left(2,8\right),\left(3,27\right)\right\}$ and ⓑ $\left\{\left(0,0\right),\left(1,1\right),\left(4,2\right),\left(9,3\right),\left(16,4\right)\right\}.$

OpenStax, Intermediate Algebra 2e · §10.1 Finding Composite and Inverse Functions · Example 3