📈 Linear Equations

Two straight lines, two equations. Where they cross is the solution! Slide the numbers and watch.

Line 1: y = 1x + 2

slope m₁ 1

intercept c₁ 2

Line 2: y = -1x + -2

slope m₂ -1

intercept c₂ -2

Solution (where they meet)

—

🧠 The Big Idea

Each linear equation is a straight line. Solving two together means finding the point (x, y) that lies on both.
One crossing → one unique solution. Parallel lines → no solution. Same line → infinitely many solutions.
You can solve them by graphing, substitution or elimination — the graph shows why the answer works.