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# Algebra: functions and linear system

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Part 1
1. Define the word "function."
2. Give an example of a function using a set of at least 4 ordered pairs. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and 5.
3. Explain why the example models a function.
4. Give an example of at least four ordered pairs that does not model a function. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and +5.
5. Explain why your example does not model a function.

Part 2
1. Select any two integers between -12 and +12 which will become solutions to a system of two equations.
2. Write two equations that have your two integers as solutions. Show how using the equations using your integers. Solve the system of equations by the addition/subtraction method. Make sure you the necessary 5 steps are included.

https://brainmass.com/math/number-theory/algebra-functions-linear-system-563861