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# LHS Algebra 1 C1

### LHS Algebra 1 C1 Expressions, Equations, and Functions

TermDefinition
coordinate system The grid formed by the intersection of two number lines, the horizontal axis and the vertical axis.
coordinate plane The plane containing the x- and y-axes.
x-axis The horizontal number line on a coordinate plane.
y-axis The vertical number line on a coordinate plane.
origin The point where the two axes intersect at their zero points
ordered pair A set of numbers or coordinates used to locate any point on a coordinate plane, written in the form, (x, y).
x-coordinate The first number in an ordered pair.
y-coordinate The second number in an ordered pair.
relation A set of ordered pairs.
mapping Illustrates how each element of the domain is paired with an element in the range.
domain The set of the first numbers of the ordered pairs in a relation.
range The set of second numbers of the ordered pairs in a relation.
independent variable The variable in a function with a value that is subject to choice.
dependent variable The variable in a relation with a value that depends on the value of the independent variable.
function A relation in which each element of the domain is paired with exactly one element in the range. (no repeating x's)
discrete function A function of points that are not connected.
continuous function A function that can be graphed with a line or a smooth curve.
vertical line test If any vertical line passes through no more than one point of the graph in a relation, then the relation is a function.
function notation A way to name a function that is defined by an equation. The equation y = 3x - 8 is written as f(x) = 3x - 8.
nonlinear function A function with a graph that is not a straight line.
Created by: shelley.wirtz