
Math Practice Online > free > lessons > Ohio > 8th grade > Function Tables 2
If your child needs math practice, click here.
For sample problems, click here.
Here are some tips for Function Tables 2, which aligns with Ohio state standards:
Function Tables 2
This topic continues the topic of function tables.
To review the basics of function tables, see here.
Example 1: Apply the rule
Use the given rule to fill in the missing values.
Find the missing y values, substitute the input values for x in the rule ( y = x ÷ 4).
 
 | 24   → | 
      | 
     →   6 |  
 | 4   → | 
      | 
     →   1 |  
 | 36   → | 
      | 
     →   9 |  
     
   
 
 | To find the  missing x value, solve for y. |  
 | y | = | x ÷ 4 |  
 | 8 | = | x ÷ 4 |  
 | 8 × 4 | = | x ÷ 4 × 4 |  
 | 32 | = | x |  
  
 | 
 So the answer is | 
 
 | 
Example 2: Word problem
Fill in the missing values and find the rule that applies to the table. Write the rule in the format "y = ".
Maria has 5 more cookies than Jeremy.
1.   Find the rule
Translate the sentence into an algebraic expression.
 
 
                | Maria has | 
                 | 
                5 more cookies | 
                than Jeremy |  
 
                | Number of cookies Maria has | 
                is | 
                5 more than | 
                the number of cookies Jeremy has |  
 
                | y | 
                = | 
                + 5 | 
                x |  
  
 | 
So the rule is y = x + 5.
2.   Apply the rule
To apply the rule ( y = x + 5), substitute the input values for x in the rule.
 
 | 9   → | 
      | 
     →   14 |  
 | 7   → | 
      | 
     →   12 |  
 | 8   → | 
      | 
     →   13 |  
 | 1   → | 
      | 
     →   6 |  
  
 | 
So the answer is
 
Example 3: Word problem
Fill in the missing values and find the rule that applies to the table. Write the rule in the format "y = ".
Octagons have 8 sides.
1.   Find the rule
Translate the sentence into an algebraic expression.
This is a rate problem where the rate is 8 sides per octagon.
So, 
 
 
                | number of sides | 
                 =  | 
                sides per octagon | 
                 ×  | 
                number of octagons |  
 
                | y | 
                 =  | 
                8 | 
                 ×  | 
                x |  
  
 | 
So the rule is y = 8x.
2.   Apply the rule
To apply the rule ( y = 8x), substitute the input values for x in the rule.
 
 | 8   → | 
      | 
     →   64 |  
 | 3   → | 
      | 
     →   24 |  
 | 6   → | 
      | 
     →   48 |  
 | 2   → | 
      | 
     →   16 |  
  
 | 
So the answer is
Copyright Accurate Learning Systems Corporation 2008.
MathScore is a registered trademark.