# Math Vocabulary

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 y-intercept. An alternate form is Ax + By = C

y = 2x - 3
or
2x - y = 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 straight-line 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: logb x is the power to which the base b must be raised to obtain x
Logarithmic function A function in the form y = logb x
This is the inverse of an exponential function

Comments, questions, or you just need some help? Send an e-mail to Mrs. Shearer Last Updated: 9/27/2011  