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Chapter 2 review

absolute value function a function of the form f(x)=|mx+b|+c , where m = 0 , is am absolute value function
dependent variable if a function is defined by an equation using the variables x and y , where y represents output values , then y is the dependent variable
direct variation a linear function defined by an equation of the form y=kx , where k=0 , represents direct variation
domain the domain of a relation is the set of all inputs , or x-coordinates , of the ordered pairs
function a function is a relation in which each element of the domain is paired with exactly one element of the range
function notation if F is the name of a function, the function notation f(x) also indicates the function name , but also represents a range value for the domain value x. you read the function notation f(x) as "f of x" a function of x". not that f(x) does not mean "f times
independent variable if a function is defined by an equation using the variables x and y , where x represents input values , then x is the independent variable
linear equation a linear equation in two variables is an equation that can be written in the form ax+by=c
linear function a function whose graph is a line is a linear function . you can represent a linear function with a linear equation
linear inequality a linear inequality is an inequality in two variables whose graph is a region of the coordinate plane that is bounded by a line. each point in the region is a solution of the inequality . a sign of < or > indicates a solid boundary line. a sign of < or >
mapping diagram a mapping diagram describes a relation by linking elements of the domain with elements of the range
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