Formulas & Definitions
The slope formula
y2-y1/x2-x1
(0,6) (8, 12)
6/8 = 3/4
slope = 5 b = 3
What is y=5x+3
y=5x+4
Zero and undefined are types of...
Slope
Slope is equal to
What is rise over run
(5, 5) (8, 9)
4/3
m= -6 b=5
y=-6x+5
(0, -6) m=6
y=6x-6
When the zero is in the denominator it is an...
undefined slope
What is m and b
(-6, -4) (-8, -9)
-5/-2 = 5/2
m= 3/4 b= 7/8
y=3/4x+7/8
(4, 8) m=-2
y=-2x+16
When the zero is in the numerator it is a....
zero slope
Define y-intercept
The point where a line crosses the y-axis
(4, 6) (-9, 6)
0/-13 = zero slope
m=-5 b=-17
y=-5x-17
(-8, -3) m=-7
y=-7x-59
A vertical line is
an undefined slope
Slope intercept form
y=mx+b
(5, 6) (5, 8)
2/0 = undefined
m= -9/3 b=4
y=-3x+4
(-20, 20) m=5
y=5x+120
A horizontal line is a
zero slope