Math Is Fun
Math Is Fun: Mathopolis: Quartiles Practice
Multiple-choice practice problems that review quartiles. Incorrect answers are corrected with short tutorials.
Other
Math N Stuff: Horizontal Lines Constant Functions
This site gives information regarding horizontal lines. The site contains a graph and poses a question relating to the equation of the line on the graph. The correct answer may be clicked on with a short reason.
Other
Math N Stuff: Vertical Lines
This site gives information regarding vertical lines. The site contains a graph and poses a question relating to the equation of the line on the graph. The correct answer may be clicked on with a short reason.