This video looks at solving by substitution and find the point of intersection of a linear system without graphing. We will see what to look for when solving by substitution to see whether there is one solution, no solution or infinite number of solutions.

This video looks at solving linear systems by graphing. We recall how to graph linear systems using the slope intercept form of y=mx+b. We look at how to graph and how to identify the point of intersection of a linear system.

KEY CONCEPTS:

In order to use the slope and intercept rules, equation MUST be in the form of y=mx+b

TRICKS to be Careful of:

y=4 (horizontal line - therefore slope is 0)

x=4 (vertical line - therefore slope is undefined)

KEY CONCEPTS:

Slope/y-Intercept form is: y=mx+b

m=slope (value in front of x ONLY when in this form y=mx+b)
b=y-intercept

slope=rise/run