Data Analysis
Measures of Center
Mean, Median, Mode, Range
Two biggest sets of numbers in the real number system, under real numbers?
Irrational and Rational
Dividing by a fraction
Multiply by the reciprocal (flipped fraction)
Closed circle
greater/less than, or equal to
Function
no repeating x-values
How is mean found?
Add all the values, then divide by number of values.
Sets under rational numbers
Integers, whole, natural
Solve for x: 10=2x
x=5
Open circle
greater/less than
Vertical Line Test
to be a function, no to points on the graph touch the same vertical line
What determines whether mean, median, or mode is the best measure of center? Give the requirement for each term.
Mean - No outliers
Median - Outliers
Mode - repeating value(s)
Order of Operations
Parentheses, Exponents, Multiplication/Division, Addition/Subtraction
Solve for x: 15=3x+3
x=4
Arrows face away on graph
"or" inquality
zero of a function
x-value when y=0
What is the lower quartile of a data set?
Median of lower half of data (minimum to median)
Combining Like Terms: two types of terms?
Constant term (no variable), variable term (with variable)
Solve for x: 2x=4x+16
x=-8
Arrows face toward each other on graph
"and" inequality
Solve f(3) for f(x)=7x-6
f(3)=15
What is the upper quartile of a data set?
Median of upper half of data (median to maximum)
Distributive Property: a(b+c) = ?
ab+ac
Solve for x: 2(-4x+2)=28
x=-3
Solve: 10<2x<36
5<x<18
Given f(x)=9+2x, if f(x)=3, find x.
x=-3