1. Warm-up 4-1

2. x – y = 33x + y = 52y = 6 – x x + y = 5x – 2y = 43x – 2y = 6 Graphs:

3. 2 or more equations occurring at the same time Solution is an ordered pair (x, y) that solves both equations Lines will do one of: 1) Intersect – 1 solution 2) Parallel – No solution 3) Same line – Infinite solutions 3 graphs were from Homework 34 (2 parts to HW 34) Lesson 4-1: Systems of Linear Equations Objective: Students will: Determine whether an ordered pair is solution to a system. Use a graph to find solutions to systems of equations.