Linear Systems of Equations Section 3.1
What is a “system” of equations?
systems can have either one solution, no solution, or an infinite amount of solutions: - if one solution, system is “independent” - if no solution, system is “inconsistent” - if infinite solutions, system is “independent” Classification of Systems
Three methods can be used to solve a linear system: - graphically - algebraically through “substitution” - algebraically through “elimination” (addition) How to “solve” a linear system…
the solution of the linear system is the point of intersection of the two graphs (ordered pair- (x, y)) Solving a linear system graphically…
What’s the solution to this linear system?
Solving a linear system graphically… these are the three situations which can happen:
Let’s solve some by using the calculator!
In-class work!