what is the function rule to this table

Question

X Y

-8 64

-4 16

0 0

 

4 16

 

Answer 1

A function rule (a formula) expresses the relationship between the dependent variable (usually y) and the independent variable (usually x).  For each allowable x, there is one or no value of y.

 

This table uses some numbers that you should recognize immediately.  Each y is x-squared.

   The function rule (formula) is:

              y = x²