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MATHS A-LEVEL / Revised Questions and Answers / Sure A+
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How do you find the equation of a straight line? - y-y1 = m( x- x1) How do you find the gradient of a line on a graph? - Increase in y --------------- Increase in x How do you find the gradient of a line using two coordinates? - y2-y1 ------ x2-x1 How do you find the line of symmetry of a quadratic graph? - x=p How do you find the minimum point of a quadratic graph? - Using the complete the square method: y= k(x-p)²+q The coordinates of the minimum point are (p,q) How do you find the perpendicular gradient? - How do you find the points of intersection? - By treating the two equations as simultaneous equations in order to work out the x and y coordinates.
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