# Common Core MATH 8 EE 6 Grade 8 Expressions And Equations Understand The Connections Between Proportional Relationships Lines And Linear Equations

**Expressions And Equations: Understand The Connections Between Proportional Relationships, Lines, And Linear Equations.**

Use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane; derive the equation y = mx for a line through the origin and the equation y = mx + b for a line intercepting the vertical axis at b.