Specify Equations in Graphing Question Answer Keys
When you use line
, circle
, parabola
, or region
in your graphing question answer key, you have the option of specifying an equation for the key. You can use the following notation in your equations.
Note
 Do not use commas or spaces to separate digits in numbers. For example, 1000000 is correct, but 1,000,000 and 1 000 000 are not.
 Do not use mixed numbers. Instead, use improper fractions. For example, 7/4 is correct, but 1 3/4 is not correct.
Expression 
Notation 
Examples 

Math variables 
The only allowed variables in graphing question answer keys are x and y. 

Addition 


Subtraction 


Multiplication 
You must use explicit multiplication. 

Division or fractions 


Exponentiation 
Ensure that your equation specifies a linear, circular, or parabolic function. 

Equality 


Inequality 


Order of Operations 


Pi (π) 
Substituting 3.14 only approximates this value. 
