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identity

imaginary numberan equality that holds true regardless of the values chosen for its variables

importa real number multiplied by the imaginary unit i, which is defined by its property i^{2}= -1.

importsgoods produced outside the boundaries of one country, which are then purchased by that country

improper fractionbring (goods or services) into a country from abroad for sale

in the blacka fraction which has its numerator value greater than the denominator. The value is greater than 1

in the redHaving a positive account balance; having more money than is owed

inchHaving a negative account balance; owing more money than is available

inclusive numbersa unit of length in the customary system of measurement. 1/12 of a foot.

incomeincludes the first and last number and all numbers in between.

income elasticitythe amount of money, property, and other transfers of value received over a set period of time in exchange for services or products.

income elasticity of demandthe quantity demanded of a particular product depends not only on its own price (see elasticity of demand) and on the price of other related products (see cross price elasticity of demand), but also on other factors such as income.

ΔD/D/ΔI/I

inconsistentmeasures the relationship between the consumers income and the demand for a certain good.

ε_{d}= ΔD/D/ΔI/I

incremental cash flowWhen a system of equations has no solution because the lines are parallel

independent variablethe potential increase or decrease in a company's cash flow related to the acceptance of a new project or investment in a new asset.

indexVariable which determines the value of dependent variables in an equation/inequality

index forman indicator, sign, or measure of something

inequalityA way of writing very large and very small numbers so that they are easier to understand and work with.

inertiaa relation which makes a non-equal comparison between two numbers or other mathematical expressions.

>, <, ≤, ≥

inflationa property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

initial velocitya general increase in the prices of goods and services in an economy

inner fencevelocity at time interval t = 0

inner quartileut-off values for upper and lower outliers in a dataset

innerquartile rangesituated between the first and third quartiles of a distribution.

inputcontains the second and third quartiles, or the middle half of your data set also known as the IQR

input tablewhat goes into a function

inradiusa table that shows the relationship between sets of numbers that always follow the same rule.

installmenta radius of an inscribed circle or sphere

installment paymentone of the amounts, usually equal, into which a debt is divided for payment at stated intervals over a fixed period

installment sales method of accountingthe option to pay for purchases over time by dividing the purchase amount into smaller equal payments

integeran approach to revenue recognition in which the business owner defers gross profit on a sale until receiving cash for the sale from the buyer

integrala whole number; a number that is not a fraction

...,-5,-4,-3,-2,-1,0,1,2,3,4,5,...

interesta mathematical object that can be interpreted as an area or a generalization of area

interest only mortgagepayment from a borrower or deposit-taking financial institution to a lender or depositor of an amount above repayment of the principal sum, at a particular rate

interest rateloan in which the borrower pays only the interest for some or all of the term, with the principal balance unchanged during the interest-only period

interest rate approximationthe proportion of a loan that is charged as interest to the borrower or proportion of principal credit given to a depositor

interior anglesA guess based on a formula for an interest rate

interior angles of a polygonthe angles between adjacent sides of a rectilinear figure

Intermediate Value TheoremAngles inside a polygon

internal rate of returnWhen we have two points connected by a continuous curve: one point below the line and the other point above the line, then there will be at least one place where the curve crosses the line.

If ƒ is a function that is continuous over the domain [a, b] and if m is a number between ƒ(a) and ƒ(b), then there is some number c between a and b such that ƒ(c) = m

interpolationthe annual rate of growth that an investment is expected to generate

intersectiona type of estimation, a method of constructing new data points based on the range of a discrete set of known data points.

intersection of 2 linesthe set containing all elements of A that also belong to B or equivalently, all elements of B that also belong to A.

A ∩ B

intervalpoint where 2 lines cross

interval countinga set of real numbers that contains all real numbers lying between any two numbers of the set

interval notationcounting by a certain multiple within intervals

intrinsic valuea method to represent an interval on a number line using subsets of the real numbers

inventorymeasures the value of an investment based on its cash flows

inventory turnovera complete list of items such as property, goods in stock, or the contents of a building

inversea financial ratio showing how many times a company turned over its inventory relative to its cost of goods sold (COGS) in a given period.

investmentopposite or contrary in position

iotaan asset or item acquired with the goal of generating income or appreciation.

irrA letter of the greek alphabet used for math notation.

Ι ι

irrational numberInternal Rate of Return

irregular verba number that can NOT be expressed as the quotient or fraction p/q of two integers

isosceles triangleverbs that do not follow the normal patterns for tense and past participle

iterationA triangle with two equal sides and an unequal third side

the process of doing something again and again, usually to improve it, or one of the times you do it: