GLOSSARY
acute triangle- A triangle with all angles smaller than 90 degrees
additive inverse- What you add to a negative number to get zero; the negative of a number
Base- The number that is going to be raised to a power
Binomial- a polynomial equation usually joined by a plus or minus sign, ex: 3x+9
categorical variables- A variable that can take on one of a limited, and usually fixed, number of possible values
Compound growth- A specific term for the geometric progression ratio that provides a constant rate of return over the time period
Constant- A number on its own, or sometimes a letter such as a, b or c to stand for a fixed number
correlation coefficient- Statistical relationships between two or more random variables or observed data values
Cube Root- A value where you can divide a number by a number and get the number you divided with.
Decay Factor- The percentage by which the original amount will decline
Decay rate- The number that you are multiplying by. It is smaller than 1.
Dependent variable- The variable that depends on the other variable to get it.
Difference of squares- two terms that are squared and separated by a subtraction sign
Distributive property- multiply a sum by multiplying each addend separately then adding the products
Expanded form- a way to write a number or equation that is separated to show easily
Exponent- a small number written with another big number that tells how many times to multiply the big number by itself
Exponential decay- A decline that is not linear and makes a curved shape on a graph.
Exponential form- A way of expressing number using a base and a smaller raised number called an exponent.
Exponential function- A function of the form
Factored form- a form of an expression in which no part can be made simpler by pulling out a common factor
function- A relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output
Growth factor- The number you multiply by when the numbers are getting bigger
Growth Rate- The percentage the number if growing by
hypotenuse- The longest side of a right triangle, opposite the right angle
Independent variable- a variable that does not depend on another variable
inverse variation- A situation in which one quantity increases while another quantity decreases
Leg- A side of a right triangle, not opposite the right angle.
Like terms- terms that have the same coefficients
Linear term- has an exponent of one and the equation is linear
Line of symmetry- an imaginary line that runs through the middle of a parabola
math model- A description of a system using mathematical concepts and language
Maximum- a term in a parabola that marks the top of the parabola. It's the point where the line ends and starts to go down
Minimum- a term in a parabola that marks the bottom of the parabola. It's the point where the line ends and starts to go back up.
multiplicative inverse- A number which when multiplied by x yields the multiplicative identity
Nth Term- An expression that will allow us to calculate the term that is in the nth position of the sequence
obtuse triangle- A triangle with one angle larger than 90 degrees and two smaller than 90 degrees
outlier- A data point that is distinctly separate from the rest of the data
Parabola- A graph that is shaped like a n or u. It has a minimum or maximum.
Pythagorean Theorem- A relation between the sides of a right triangle. It states that the square of the hypotenuse is equal to the sum of the squares of the other two sides
Radius- radius of a circle or sphere is the length of a line segment from its center to its perimeter
Quadratic function- a second-degree polynomial function of the form, where a, b, and c are real numbers
Quadratic term- A term that relates to a quadratic function
residual- The difference between the observed y-value (from scatter plot) and the predicted y-value (from regression equation line). It is the vertical distance from the actual plotted point to the point on the regression line
right triangle- A triangle with one angle of 90 degrees and two smaller than 90 degrees
scatter plot- A plot of the values of Y versus the corresponding values of X: Vertical axis: variable Y--usually the response variable. Horizontal axis: variable X
Scientific Notation- A method of writing or displaying numbers in terms of a decimal number between 1 and 10, multiplied by a power of 10
slope- A number that describes both the direction and the steepness of the line
Standard form- Written in the most commonly used way
standard variation-A measure that is used to quantify the amount of variation or dispersion of a set of data values
Square root- A value where you can divided a number by another number and get the same number
Theorem- A statement that can be proven correct
Triangular numbers- A number that can make a triangular dot pattern
Trinomial- A polynomial expression that has 3 terms and is joined by a plus or minus sign.
variance- Measures how far each number in the set is from the mean
x-intercept- The point of a line where it crosses the x-axis
y-intercept- The point of a line where it crosses the y-axis