Warm-up 4-1

x – y = 3 3x + y = 5 2y = 6 – x

x + y = 5 x – 2y = 4 3x – 2y = 6

Graphs:

• 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 solution2) Parallel – No solution3) 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.