improper fractionAny FRACTIONin which the NUMERATORis greater than
or equal to the DENOMINATOR. For example, –^32 ,– 37 ,– 45 ,– 66 ,—^128 ,—^2016 , and so
on.
See alsoSECTION IV CHARTS AND TABLES.inconsistent equationsEQUATIONs that have no SOLUTIONs.
independent variableThe VARIABLEin a direct variation formula that does
not rely on the other variable for its value. For example, in y=kxn,
y is the DEPENDENT VARIABLE, and xis the independent variable.index A number or variable used in ROOTs and POWERs to indicate the
power of a quantity. For example, when taking a root of a number, as
in √^3
−
9 the index is 3; if no root is indicated, as in √
−
25, the index is 2
(for the SQUARE ROOT). When raising a number to a power, as in 4^2 ,
the index is 2; in 4^3 , the index is 3, and so on, and in this case the
index is often called the EXPONENTor the power.
inequality AMATHEMATICAL SENTENCEthat contains quantities that are not
equal, or might not be equal, in VALUE. For example, 3x+ 6 < 29, or
y– 8≥45.inequality signAny of the symbols used to show that two quantities are
notequal or might not be equal to each other. For example: <, ≤,
>,≥,≠. The lar gest side of the inequality sign always opens to
the largest number, and the smallest side always points to
the smallest number.
See alsoSECTION IV CHARTS AND TABLES.
infinite setASETin which all of the elements, or MEMBERS, of the set
cannot be listed, including the first and last elements. For example,
A= {x|x= all EVEN NUMBERs > 0}.integer AnyWHOLE NUMBER, whether negative, positive, or zero. For
example, –5, –4, –3, –2, –1, 0, 1, 2, 3, 4, 5... are all integers.
See alsoSECTION IV CHARTS AND TABLES.
interceptThe point on a Cartesian GRAPHwhere a line crosses an axis. If the
line crosses the x-axis it is called the x-intercept, and if crosses the
y-axis it is called the y-intercept.
interdependent event An event that can only occur if another event
occurs. The PROBABILITYof two or more interdependent events
occurring is calculated as the PRODUCTof the probabilities of each
ev ent occurring.GLOSSARY improper fraction – interdependent event
GLOSSARY improper fraction – interdependent event