Which of the following relations represents a function ((4,2), (8, 16), (7.9), (13,16)
((1, 2), (1,3), (1,4), (1,5)}
(0, 3), (4, 6), (7, 13), (4.9))

Explanation is in the file

cutt.ly/rzNrBcz

The first set

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.