Mathematics (AS & A Level) · May / June 2026 · Paper 25 · Question 3
9709
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ln y (1.5, 3.22) (4.0, 4.69) O x The variables x and y satisfy the equation y kax 2 = + , where k and a are positive constants. The graph of lny against x is a straight line passing through the points (1.5, 3.22) and (4.0, 4.69), as shown in the diagram. Find the values of k and a correct to 2 significant figures. [5]
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