Linear Functions

🔹 What Is It?

A linear function is a rule that makes a straight line when you graph it.
It shows a constant rate of change — like earning money every hour.

🧩 Clue to Remember

If it graphs a straight line, it’s a linear function.

🔹 Example

• y = 2x + 3
  This means: Start at 3, then go up 2 for every 1 step to the right.
  
  

💡 Why It Matters

Linear functions help us predict, compare, and plan — like tracking cost, speed, time, and more.