# Vocabulary

## 50 terms · SMARTY

### "a" in y = abx

the variable used to represent the initial amount in an exponential function

### "b" in y = abx

the variable used to represent the growth rate in an exponential function

### "b" in y = mx + b

the variable used to represent the y-intercept in a linear function

### "m" in y= mx+b

the variable used to represent the slope of a line

### Absolute value

the distance a number is from zero

### Algebraic expression

contains numbers, variables, and operations (no equal sign)

### Area

the amount of space within a 2-dimensional figure

(a+b)+c=a+(b+c)

### Axis of symmetry

a line that divides a parabola in two equal halves and goes through the vertex

### Base of a power

the "big" number in a power

### Base of an exponential function

the growth rate of an exponential function

### Best-fitting line

the equation of a line that best follows a set of data

### Binomial

an expression that contains two terms

### Boundary line

a line that borders the shaded region on the graph of linear inequalities

### Breakeven Point

the point in which cost = profit

### Circumference

the distance around a circle

### Coefficient

the ―big‖ number in a term

### Commission

the amount of money made from making a sale

### Common difference

the constant difference between consecutive terms in a sequence

### Common ratio

the ratio of a term in a geometric sequence with the previous term

a+b=b+a

### Complementary

two angles that add to be 90 degrees

### Compound interest

interest that is earned on both the initial amount and the previously earned interest

### Congruent figures

figures that are the exact same size and shape

### Constant of variation

the ―k‖ value in direct (y = kx) or inverse variation (xy = k)

### Constant term

a term with no variable part; a value that stays the same

### Coordinates

the ordered pair that represents a point (x, y)

### Correlation

the relationship between a set of data; it can be positive, negative, constant, or no correlation

### Corresponding parts

the parts of a figure that have the same relative position

### Decay factor

the expression (1 - r) in the exponential decay model y = a(1 - r)t

### Decay rate

the rate at which an exponential function is reduced

### Degree of a monomial

the sum of the exponents of the variables

### Degree of a polynomial

the greatest degree of the terms of a polynomial

### Denominator

the bottom part of a fraction

### Dependent variable

the variable (output) that depends on the value of the independent variable (input)

### Direct Variation

a linear relationship that can be modeled with y = kx

### Discount

the amount that can be taken off of the original amount

### Distributive property

a(b + c) = ab + ac

### domain of a function

all the possible x-values of a function

### Elimination

used to solve a system of equations by adding the two equations in order to cancel out one of the variables

### Equation

an open sentence that contains an equal sign

### Equivalent equations

two equations that have the same solution

### Equivalent expressions

two expressions that are equal

### Equivalent inequalities

two inequalities that have the same solution

### Evaluate

to find the value of an expression by substituting a numbers in for the variables

### Exponent

the ―little‖ number in a power

### Exponential decay

a situation that decreases by the same percent each time; the growth rate is 0 < b < 1

### Exponential function

a functions that can be represented by y = a(b)x

### Exponential growth

a situation that increases by the same percent each time; the growth rate is b > 1