Lesson # 5 Matching Equations Of A Graph
You now possess all the skills necessary to identify the graph created by a linear equation.
Keep in mind the following hints to help match up equations quickly.
SLOPE
 Is the slope positive or negative?
 What is the rise/run?
Y-INTERCEPT
 If the equation is in slope-intercept form you can rule out certain graphs very quickly
if they don’t pass through the y-intercept given in the equation
STANDARD FORM EQUATIONS
 Your best bet is to change all equations to slope-intercept form as this gives you
significantly more information and makes it easier to compare all equations.
Horizontal Line
 The equation must be (y=?) where (?) is the y-intercept
Vertical Line
 The equation must be (x=?) where (?) is the x-intercept
EXAMPLE
Match the following graphs with each of the equations
y  2x  4
2y  x  6
3y  2x  12