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32 Cards in this Set
- Front
- Back
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function
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2 sets and a rule that assigns each element of the first set to an element of the second set
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domain
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set of values of the independent variables of a given function
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range
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set of values that a given function takes as its argument varies through its domain
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one to one function
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each x value corresponds to only one y value and each y value only corresponds to one x value
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horizontal axis
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x axis
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vertical axis
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y axis
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origin
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the intersection of 2 axes, and has (0,0) coordinates
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rectangular (or cartesian) coordinate system
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method of locating and describing points using horizontal and vertical axes
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slope
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ratio of the rise (y) to the run (x)
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linear equation
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first degree equation. It's graph is a straight line.
y = mx + b |
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nonlinear equation
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higher than the first degree equation. It's graph is not a straight line.
y = ax2 + bx + c |
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positive slope
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lines extending from lower left to upper right in a rec. coordinate system
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negative slope
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lines extending from upper left to lower right in a rec. coordinate system
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numberic variable
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a quantitative variable that describes a numberically measured value (discrete or continuious)
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discrete variable
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a numeric variable that takes only a finite # of real values
ex. 1, 2, 3, 5 |
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continuous variable
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a numeric variable which can assume an infinite number of real values
ex. age, distance, tempt |
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measure of central tendency
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a single number that is most representative of the entire collection of numbers
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data
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facts or numbers that describe something
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statistics
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the branch of mathematics that studies techniques for collecting, organizing & interpretting data
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graph
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pictorial rep. made for the purpose of studying changes in a single variable or comparing sev
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graphs reveal 2 kinds of info
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1. facts
2. result of a study |
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applications of graphs
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make it easy to present& analyze large amount of numerical & factual info.
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every graph must have-
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title, labels, correctly scaled axes, correctly plotted data
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natural numbers
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counting numbers or positive integers
ex. 2,3,4,... |
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integers
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whole numbers, negative whole numbers and zero
ex. -72, 0 29 |
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rational numbers
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any number that can be written as a ratio of two integers (can write it as a fraction den.& num. integers)
ex. 2/5 |
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irrational numbers
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any number that is not a rational number
ex. square root of 2, pi |
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real numbers
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any number on the number line
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simple interest
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i = prt
interest = principle x rate x time |
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compound interest
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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 |
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slope intercept
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y = mx + b
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find slope containing points..
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y2 - y1/ x2 - x1
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