10.1 Exercise 12

For each set of ordered pairs, determine if it represents a function and if so, is the function one-to-one.

ⓐ $\left\{\left(27 , −3\right) , \left(8 , −2\right) , \left(1 , −1\right) , \left(0 , 0\right) , \left(1 , 1\right) , \left(8 , 2\right) , \left(27 , 3\right)\right\}$ ⓑ $\left\{\left(7 , −3\right) , \left(−5 , −4\right) , \left(8 , 0\right) , \left(0 , 0\right) , \left(−6 , 4\right) , \left(−2 , 2\right) , \left(−1 , 3\right)\right\}$