3.5 Exercise 14

Use the set of ordered pairs to (i) determine whether the relation is a function (ii) find the domain of the relation (iii) find the range of the function.

ⓐ $\left\{\left(−3 , −6\right) , \left(−2 , −4\right) , \left(−1 , −2\right) , \left(0 , 0\right) , \left(1 , 2\right) , \left(2 , 4\right) , \left(3 , 6\right)\right\}$

ⓑ $\left\{\left(8 , −4\right) , \left(4 , −2\right) , \left(2 , −1\right) , \left(0 , 0\right) , \left(2 , 1\right) , \left(4 , 2\right) , \left(8 , 4\right)\right\}$