Checking solutions to two-variable linear equations

The  exercise appears under the 8th Grade Math Mission. This exercise recognizes whether sets of number satisfy a function or not.

Types of Problems
There are two types of problems in this exercise:


 * 1) Determine which point is on the graph: This problem provides a graph and several points. The student is asked to determine which of the points are actually points on the function.Opstle1.png
 * 2)  Determine which point is on the function rule: This problem provides a function and several points. The student is asked to determine which point is actually on the function.Opstle2.png

Strategies
Knowledge of function notations and the various forms of functions are an advantage when trying to complete this exercise.
 * 1) This is NOT multiple select. Once a point is found that works, that is the one solution.
 * 2) The correct answer choice seems to be among the bottom half of choices about 70% of the time, therefore it might be slightly more efficient to start plugging in from the bottom.

Real-life applications

 * 1) Functions are the building blocks of much of the calculus.
 * 2) Functions can be used to model many aspects of business and science.