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# Unit 3 vocabulary

TermDefinition
constant of proportionality the constant value of the ratio of two proportional quantities x and y; usually written y=kx where k is the factor of proportionality
direct variation a relationship between two variables wherein their ratio remains constant. An equation or function expressing such a relationship
linear equations in which each term is either a constant or the product of a constant and a single variable
slope the ratio of the verticle and horizontal changes between two points on a surface or a line
x-intercept The point where a line meets or crosses the x-axis
y-intercept The point where a line meets or crosses the y-axis
unit rate The estimated market value contribution for each unit of an improvement.
slope intercept form A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and a single variable
point-slope form the equation of a straight line in the form y − y1 = m(x − x1) where m is the slope of the line and (x1,y1) are the coordinates of a given point on the line
proportional relationship Two quantities are proportional if they vary in such a way that one of them is a constant multiple of the other.
rate of change Momentum and rate of change are simple technical analysis indicators showing the difference between today's closing price and the close N days ago
intersecting line he notion of line or straight line was introduced by ancient mathematicians to represent straight objects with negligible width and depth. Lines are an idealization of such objects
Created by: jajakyr