A relation in which each element of the domain is paired with exactly one element in the range

set of all inputs, or x-coordinates of the ordered pairs

the set of all outputs, or y-coordinates of the ordered pair

an equation between two variables that give a straight line when plotted on a graph

A dependent variable is a variable whose value depends upon independent variable y

an input value of a function

The equation of any straight lin

he quickest method for finding the equation of line given two points 

the equation of a straight line 

The x-intercept of a line is the point at which the line. crosses the x axis. 

where the line crosses the y-axis

a visual way to determine if a curve is a graph of a function or not