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solution of an equation
when the variable in a single-variable equation is replaced by a number and the resulting statement is true, p24; in two variables x and y is an ordered pair (x,y) that makes the equation true, p210
the variable is raised to the first power and does not occur in a denominator, inside a square root symbol, or inside absolute value symbols, p133
one way to analyze the relationships between two quantities is to graph the pairs of data on a coordinate axis, p204
graph of a linear equation
in x and y is the set of all points (x,y) that are solutions of the equation, p210
m of a nonvertical line is the number of units the line rises or falls for each unit of horizontal change from left to right, 226
constant of variation
two variables x and y vary directly if there is a nonzero number k such is true that the number k is the _______ _______, p234
in general, the symbol f(x) replaces y and is read as "the value of f at x" or simply as "f of x" which does not mean f times x where f is called _______ ________, p257
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