Graph Linear Equations

1
Graph Linear Equations
2
y-intercept
3
4
4 3
m
x-intercept
3
Slope-Intercept Form of a Line
y mx b
slope
y-intercept
4
Graph y 2/3 x - 1

• Plot the
• y-intercept

.
.

• Use slope
• to plot
• remaining
• points

.
5
If the equation is already written in standard
form Ax By C

• Find the x-intercept (let y 0, and
• solve for x.

• Find the y-intercept (let x 0, and
• solve for y.

• Plot both intercepts.

• Draw a line through both points.

6
Graph 2x 3y 6
x-int 2x 3(0) 6 2x 6
x 3 (3, 0)
.
.
y-int 2(0) 3y 6 3y 6
y 2 (0, 2)
7
Horizontal Lines y c
passes through the point (0, c)
y -2 plot (0, -2) and draw a horizontal line
passing through it.
.
8
Vertical Lines x c
passes through the point (c, 0)
x -2 plot (-2, 0) and draw a vertical line
passing through it.
.