One-variable Statistics
This mathematical term is commonly known as the average.
Mean
Is this line elevating or descending?
y = 3x + 1
Elevating
x - 7 = 3
x = 10
Equivalent Equations
Equations that have the exact same solutions
6 x (1-12) Circle
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72
The middle number is this.
Median
Is this line elevating or descending?
y = -4x +1
Descending
2x + 4 = 12
x = 4
System of Equations
two or more equations that represent the constraints in the same situation
9 x (1-12) Circle
9, 18, 27, 36, 45, 54, 63,72, 81, 90, 99, 108
What are at least three of the five parts of the five number summary?
Minimum, Q1, Median, Q3, Maximum
Where would this line intersect the y-axis?
y = 2x - 3
at (0,-3)
x / 7 = 3
x = 21
Substitution
Replacing a variable with an expression it is equal to
7 x (1-12) circle
7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84
When the data is skewed, this measure of center is preferred.
Median
y = 5x -8
If x = 3, then y=?
7
4(x + 5) = 16
x = -1
Elimination
a method of solving a system of two equations in two variables where you add or subtract a multiple of one equation to another in order to get an equation with only one of the Variable (thus eliminating the other variable).
8 x (1-12) circle
8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96
A histogram with two peaks at opposite ends would be called this.
Bi-modal
y=3x+5
If y=11, then x=?
2
5( 2(x + 4)) = 40
x = 0
Solution to a system of equations
a coordinate pair that makes both equations in the system true. On a graph, the solution is the point where the lines intersect.
12 x (1-12) circle
12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144