Select either relation (if the set is a relation but not a function), function (if the set is both a relation and a function), or neither (if the set is not a relation).
a = {(1, 2) (2, 2) (3, 2) (4, 2)}
pick one? ?

relation
function
neither

Does this help?

A= {(1,2) (2,2) (3,2) (4,2)}

Function

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c