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All terms in this list:

Relation: A set of ordered pairs

Domain: The set of values of the independent variable(s) for which a function or relation is defined. Typically this is the set of x-values that give rise to real y-values.

Range: The set of y-values of a function or relation. More generally, the range is the set of values assumed by a function or relation over all permitted values of the independent variable(s)

function: A relation for which each element of the domain corresponds to exactly one element of the range.

vertical line test: A test use to determine if a relation is a function. A relation is a function if there are no vertical lines that intersect the graph at more than one point.

one-to-one function: A function for which every element of the range of the function corresponds to exactly one element of the domain. One-to-one is often written 1-1.

independent variable: A variable in an equation that may have its value freely chosen without considering values of any other variable. For equations such as y = 3x – 2, the independent variable is x. The variable y is not independent since it depends on the number chosen fo

dependent variable: A variable that depends on one or more other variables. For equations such as y = 3x – 2, the dependent variable is y. The value of y depends on the value chosen for x. Usually the dependent variable is isolated on one side of an equation. Formally, a d

linear function: A function that can be graphed on a graph as a line.

mapping: A set of values in an oval on the left (domain) connect to a set of values in an oval on the right (range).

y-intercept: A point at which a graph intersects the y-axis.

Slope: A number which is used to indicate the steepness of a line, as well as indicating whether the line is tilted uphill or downhill. Slope is indicated by the letter m.

x-intercept: A point at which a graph intersects the x-axis. The x-intercepts of a function must be real numbers, unlike roots and zeros.

Slope-intercept form: y = mx + b, where m is the slope and b is the y-intercept. Slope-intercept is the form used most often as the simplified equation of a line.

Standard form: Ax + By = C, where A > 0 and, if possible, A, B, and C are relatively prime integers. The standard form is used in some algebra classes for practice in manipulating equations. Otherwise it is used far less often than other forms for the equation of a l

Point-slope form: y – y1 = m(x – x1), where m is the slope and (x1, y1) is a point on the line. Point-slope is the form used most often when finding the equation of a line.

linear equation: An equation that can be written in the form "linear polynomial = linear polynomial" or "linear polynomial = constant".

Transformation: Operations that alter the form of a figure. The standard transformations are translations, reflections, dilations (stretches), compressions (contractions or shrinks), and rotations.

Parallel lines: Lines that have the same slope

Inverse: The quantity which cancels out the a given quantity. There are different kinds of inverses for different operations.

Perpendicular lines: Lines that intersect. They have opposite reciprocals

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Definitions from Wiktionary under the GNU FDL.
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