the set of points where the two sides of a two-variable linear inequality are equal
constant of proportionality
a constant ratio of two variables related proportionally
a relationship between two variables in which the data increase or decrease together at a constant rate
an equation whose solutions form a straight line on a coordinate plane
a mathematical sentence using >, <, ≥, or ≤ whose graph is a region with a straight-line boundary
y-y1 = m(x-x1), where m is the slope and (x1,y1) is the point the line is passing through.
a linear equation written in the form y=mx+b where m is the slope and b is the y-intercept of the equation's graph
the x-coordinate of a point where a graph crosses the x-axis
the y-coordinate of a point where a graph crosses the y-axis
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