What rule are they applying to every input in order to get the desired output? Input Output 36 12 48 16 60 20

A function is when one variable or term depends on another according to a rule. There is a special relationship between the two variables of the function where each value in the input applies to only one value in the output. These rules are called function rules, because they explain how the function operates. The function rule is the same thing as the expression. Here are some hints for writing function rules:

Decipher the pattern of the function by asking, “What happened to the input to get the output?”

Write the rule as an expression.

Take a look at the following function rule and determine if it is a rule for the data in the table below.

x+4

InputOutput

25

36

47

58

First, substitute the input values in for x to see if you get the corresponding output value.

x+42+46

This does not equal the corresponding output value of 5.

Look at the other input values. Each term in the input became the term in the output when 3 was added to it. The rule states that four was added. Therefore, this is not a viable rule.

Here is another function.

5x

Step-by-step explanation:

answer: graph 2

step-by-step explanation: