Answer
a. $(Bangladesh, 1.7)$, $( China,1.7)$, $(Haiti,1.8)$, and $( Myanmar,1.8)$.
b. function
c. $(1.7, Bangladesh)$, $(1.7, China)$, $(1.8, Haiti)$, and $(1.8, Myanmar)$.
d. not a function
Work Step by Step
a. We can write a set of four ordered pairs as
$(Bangladesh, 1.7)$, $( China,1.7)$, $(Haiti,1.8)$, and $( Myanmar,1.8)$.
b. The relation in part (a) is a function because each value in the domain (country name) corresponds to only one value (rating).
c. We can write a set of four ordered pairs in the given format as
$(1.7, Bangladesh)$, $(1.7, China)$, $(1.8, Haiti)$, and $(1.8, Myanmar)$.
d. The relation in part (c) is not a function because the same value in the domain ($1.7$) corresponds to more than one country name (Bangladesh and China).
