Algebra-1

To determine which number is not an element of the domain from the given points:

{(−3.75,5),(−2.5,3.75),(−3.75,2.5),(−5,3.75),(−3.75,1.25),(−3.75,0)}

We need to identify all unique x-values (first elements of the ordered pairs): The x-values (domain) are −3.75,−2.5,−5.