Word  Definition  Examples  

J  
Jerk  In Calculus, the third derivative of an equation  y'''  
K  
k  Used to represent a constant in many equations, especially in Calculus.  If y = k f(x), y' = k f'(x) 

Kite  A quadrilateral with two pairs of adjacent sides congruent and no opposite sides congruent  
L  
Lambda Λ λ  Greek letter sometimes used in math problems or to represent wave lengths in physics.  
Law of Cosines  Used to find a missing side in any triangle when you know two sides and the angle between them.  See Trigonometry  
Law of Sines  The ratio between an angle in any triangle and the side opposite that angle is a constant.  
Legs of a right triangle  The sides that form the right angle in a right triangle  
Like terms  Terms with exactly the same variable factors  6y and 3y are like terms 2ab and 5ab are like terms 

Line  A series of points that extends forever in two directions. A line is uniquely defined if you know two points on the line.  
Line graph  A graph that has data points connected by lines  
Line of best fit  The trend line that most closely matches your data points on a scatter plot.  
Line segment  Part of a line consisting of two endpoints and all the points between them.  
Linear  Something that graphs as a straight line, may be an equation or a term within an equation.  y = 3x  2 is a line  
Linear equation  An equation with one variable no exponents  7 = 2x  3  
Linear extrapolation  The use of a linear equation to predict values that fall outside the range of data.  
Linear function  A function that graphs as a straight line. Its form is usually y = mx + b where m is the slope and b is the yintercept. An alternate form is Ax + By = C 
y = 2x  3 

Linear relationship  A relationship in which there is a constant rate of change between two variables; for each unit increase in one variable, there is a constant change in the other variable  A linear relationship between two variables can be represented by a straightline graph and by an equation of the form y = mx + b. The rate of change is m, the coefficient of x.  
Logarithm (log)  An exponent: log_{b} x is the power to which the base b must be raised to obtain x  
Logarithmic function  A function in the form y = log_{b} x This is the inverse of an exponential function 
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Last Updated: 9/27/2011
© K. A. Shearer 20052011
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