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a rule applied to variables to make an equation, so that there is only one answer (output value) for each input value used.
the set of possible y-values (values of the dependent variable) for a function.
an equation that contains at least one variable with an exponent.
two lines are parallel if their gradients are the same. This means that the two lines can never...
a graph consisting of bars, the heights (or lengths) of which correspond to the numerical values...