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two lines are parallel if their gradients are the same. This means that the two lines can never intersect or meet.
represents the rate of change or gradient of a function at any particular point.
a summary of a data set that includes the minimum and maximum values, and the first, second and...
the set of all the elements under consideration. The complement of the universal set is the...
a value towards which a sequence or series tends; or a position towards which a line moves.
a line drawn from the vertex of a triangle perpendicular to the side opposite the vertex.