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Identity: For addition: The number 0; that is N + 0 = N
for any number N. For multiplication: The number 1; that is, N
x 1 = N for any number N.
Indirect measurement: A process where the measurement of
some entity is not obtained by the direct reading of a measuring
tool, or by counting of units superimposed alongside or on that
entity. For example if the length and width of a rectangle are
multiplied to find the area of that rectangle, then the area is
an indirect measurement.
Integers: The set of numbers: {..., -6, -5, -4, -3, -2,
-1, 0, 1, 2, 3, 4, 5, 6,...}
Intercept: The points where a line drawn on a rectangular-coordinate-system
graph intersect the vertical and horizontal axes.
Inverse: For addition:
For any number N, its inverse (also
called opposite) is a number -N so that N + (-N) = 0 (e.g., the
opposite of 5 is -5, the opposite of -3/4 is 3/4).
For multiplication:
For any number N, its inverse (also called
reciprocal) is a number N* so that N x (N*) = 1 (e.g., the reciprocal
of 5 is 1/5; the reciprocal of -3/4 is -4/3.
Linear equation: An equation of the form y = ax + b, where
a and b can be any real number. When the ordered pairs (x, y)
that make the equation true for specific assigned values of a
and b are graphed, the result is a straight line.
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