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(between two points on a curve) the inclination of a straight line through two points on a curve calculated using the formula m = (y2 - y1) ÷ (x2 - x1).
two lines are parallel if their gradients are the same. This means that the two lines can never...
a pair of surds which multiply together to give a rational number..
a cone with the line from the vertex to the centre of the base perpendicular to the base.
a function that describes a relationship between two variables, at least one of which has an...