Write a few sentences explaining how to determine whether a relation shown in a table or a graph is a function.

y=f (x)

y=5x

y=3x

are examples of function

Step-by-step explanation:

definition of a function

if there is one to one relation between a relation

then it is defined as a function

for example

y=5x is a function

because when we put some value of x it gives back only one value of y as output.

y=±5x is not a function because one value of x gives two values (positive and negative) values of y hence not a function.