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32 Cards in this Set
 Front
 Back
function

2 sets and a rule that assigns each element of the first set to an element of the second set


domain

set of values of the independent variables of a given function


range

set of values that a given function takes as its argument varies through its domain


one to one function

each x value corresponds to only one y value and each y value only corresponds to one x value


horizontal axis

x axis


vertical axis

y axis


origin

the intersection of 2 axes, and has (0,0) coordinates


rectangular (or cartesian) coordinate system

method of locating and describing points using horizontal and vertical axes


slope

ratio of the rise (y) to the run (x)


linear equation

first degree equation. It's graph is a straight line.
y = mx + b 

nonlinear equation

higher than the first degree equation. It's graph is not a straight line.
y = ax2 + bx + c 

positive slope

lines extending from lower left to upper right in a rec. coordinate system


negative slope

lines extending from upper left to lower right in a rec. coordinate system


numberic variable

a quantitative variable that describes a numberically measured value (discrete or continuious)


discrete variable

a numeric variable that takes only a finite # of real values
ex. 1, 2, 3, 5 

continuous variable

a numeric variable which can assume an infinite number of real values
ex. age, distance, tempt 

measure of central tendency

a single number that is most representative of the entire collection of numbers


data

facts or numbers that describe something


statistics

the branch of mathematics that studies techniques for collecting, organizing & interpretting data


graph

pictorial rep. made for the purpose of studying changes in a single variable or comparing sev


graphs reveal 2 kinds of info

1. facts
2. result of a study 

applications of graphs

make it easy to present& analyze large amount of numerical & factual info.


every graph must have

title, labels, correctly scaled axes, correctly plotted data


natural numbers

counting numbers or positive integers
ex. 2,3,4,... 

integers

whole numbers, negative whole numbers and zero
ex. 72, 0 29 

rational numbers

any number that can be written as a ratio of two integers (can write it as a fraction den.& num. integers)
ex. 2/5 

irrational numbers

any number that is not a rational number
ex. square root of 2, pi 

real numbers

any number on the number line


simple interest

i = prt
interest = principle x rate x time 

compound interest

A = P(l + r/n)nt (power)
$660 8% per year for 2 yrs. .08 x 600 = 48.00 600+48= $648 yr. 1 648(.08)= 699.94 yr. 2 

slope intercept

y = mx + b


find slope containing points..

y2  y1/ x2  x1
