HOY VUX
y
Positive slopes:
x
y
Zero slopes
x
y
Negative slopes
x
y
Special Case:
Vertical lines have undefined slope.
x
HOY VUX
Horizontal lines
0 slope
Y: equation is y = #
Horizontal lines
0 slope
Y: equation is y = #
y = 4
y = ­2
y = 0
y = ­5
Vertical lines
Undefined slope
X: equation is x = #
x = ­3
x = 6
x = 0
x = ­4
Vertical lines
Undefined slope
X: equation is x = #
Inequalities
Horizontal lines
0 slope
Y: equation is y = #
y < 4
y ≥ ­2
y ≤ 0
y < ­5
Vertical lines
Undefined slope
X: equation is x = #
x ≤ ­3
x > 6
x < 0
x ≥ ­4

Algebra IA