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# Datelines

## How much does age matter in a relationship?

How much does age matter in a relationship? While some people believe that love knows no bounds, others think that partners should still be relatively close to one another age-wise.

In this lesson, students use a system of linear inequalities to explore the popular dating rule-of-thumb, ‘half plus seven’, and debate how important age -- and other factors -- are in healthy relationships.

### REAL WORLD TAKEAWAYS

• In a relationship it’s important to be able to relate to the other person – to have common experiences and shared priorities and mutual interests. Age is one factor that might contribute to or hinder this, but it’s certainly not the only one.

### MATH OBJECTIVES

• Write linear inequalities from a verbal description
• Graph a system of linear inequalities with a domain restriction
• Write and solve inequalities to answer real-world questions
• Find an inverse function

Appropriate most times as students are developing conceptual understanding.
Algebra 1
Solving Linear Systems
Algebra 1
Solving Linear Systems
Content Standards
Mathematical Practices