Info Limbo! Flashcards
Linear Equation Using Two Points
Find the slope, use point Slope form, simplify if needed.
Parallel Lines
Same slope
Perpendicular Lines
Negative reciprocal slope
Horizontal Lines
Y-axis, slope is 0
Vertical Lines
X-axis, slope is undefined
How to make an equation using slope and points?
Use point-slope form. (Might need to multiply negative reciprocal in some cases)
Perfect Strong Correlation?
1
Perfect Negative Correlation?
-1
No Correlation?
0
Association
Two variables are related.
Causation
One variable causes the other.
Scientific Notation?
If the # large, move decimal to left and it’s positive. If the # small, move decimal to right and it’s negative.
Matching graphs
Positive slope: Upward, Negative slope: Downward.
Transformations of Linear Equations
Vertical Stretch (slope): Multiply y-values by k > 1 (fx = x) = y: 1x + 0
Transformations of Linear Equations Pt.2
Vertical Shrink (y-intercept): Multiply y-values by 0 < k < 1. Up: Steep. Down: Less Steep.
Transformations of Linear Equations, Reflections
Negative slope reflects over the x-axis.
One solution
Lines intersect at one point.
No solution
Lines are parallel.
Infinite Solutions
Lines overlap. (Same line)
a1
First term
n
Term you’re solving for.
PEMDAS
Parentheses, then exponents, finally, multiplication/division, addition/subtraction.
Shading Graphs
Above for ≥ & >. Below for ≤ & <
Line in Graphs
Dashed line for < & >. Solid line for ≥ & ≤.
Converting with Formulas
Start Point-Slope form, treat it as equation when solved, solve, and then standard form (reciprocal). A IN STANDARD FORM MUST BE POSITIVE WHEN CONVERTING.
System of Equations
When it’s word Problems, look for a word that is being repeated constantly. That’s your Standard Form. The excluded number will be your x + y = some #.
d
Constant difference (Arithmetic)
r
Constant ratio (geometric)
