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# Ch 8 Vocab

### Ch 8 Vocab;

Arithmetic Sequence A sequence in which the difference between any two consecutive terms is the same.
Common Difference The difference between any two consecutive terms in an arithmetic sequence.
Constant of Variation The slope,or rate of change,in the equation y=kx, represented by k.
Constant Rate of Change The rate of change between any two data points in a linear relationship is the same or constant.
Dependant Variable The variable in a relation with a value that depends on the value of the independant variable.
Direct Variation A special type of linear equation that describes rate of change. A relationship such that as x increases in value, y increases or decreases at a constant rate.
Family of Functions A set of functions that is related in some way.
Functio Notation A way to name a function that is defined by an equation. In function notation, the equation y=3x-8 is written as f(x)=3x-8.
Independant Variable The variable in a function with a value that is subject to choice.
Line of Fit On a scatter plot, a line drawn that is very close to most of the data points. The line that best fits the data.
Linear Equation An equation in which the variable appear in separate terms and neither variable contains an exponent other than one. The graph of a linear equation is a straight line.
Linear Relationship Relationship that have straight line graphs.
Point-Slope Form An equation of the form y-y1=m(x-x1), where m is the slope and (x1,y1) is a given point on a nonvertical line.
Rate of Change A change in one quantity with respect to another quantity.
Sequence An ordered list of numbers.
Slope The ratio of the rise, or vertical change, to the run, or horizontal change. The slope descirbes the steepness of the line.
Slope-Intercept Form A linear equation in the form y=mx+b, where m is the slope and b is the y-intercept.
Subsitution Use algebraic methods to find an exact solution of a system of equations.
System of Equations A set of two or more equations with the same variables.
Term Each number within a sequence is called a term.
Vertical Line Test If any vertical line drawn on the graph of a relation passes through no more than one point on the graph for each value of x in the domain, then the relation is a function.
X-Intercept The x-coordinate of a point where a graph crosses the x-axis.
Y-Intercept The y-coordinate of a point where a graph crosses the y-axis.
Created by: phms_PA