1
Q
Quadratic Formula
A
-b ± √b² - 4ac / 2a
2
Q
Table of Signs :
< 0
A
Negative
3
Q
Table of Signs :
> 0
A
Positive
4
Q
Distance Formula
A
Draw right triangle
5
Q
Midpoint Formula
A
Average of x and y
(x₁ + x₂ / 2 , y₁ + y₂ / 2)
6
Q
Slope Formula
A
Difference of y over difference of x
m = y₂ - y₁ / x₂ -x₁
7
Q
Slope of Vertical Line
A
undefined
8
Q
Slope of Horizontal Line
A
0
9
Q
Equation of a Line
Point-Slope Form
A
y - y₀ = m (x - x₀)
10
Q
Equation of a Line
Slope-Intercept Form
A
y = mx +b
11
Q
Slope of Parallel Lines
A
SAME SLOPE
12
Q
Slope of Perpendicular Lines
A
Negative Reciprocal
MATH 20 UNIT 1
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