Given that y is directly proportional to square root of x and that y = 20 when x = 49 find an expression to represent x and y.
y = k √x20 = k √49 20/7 = ktherefore y = 20/7 √x
AP
Related Maths GCSE answers
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A,B and C all lie on the line x^2 + y^2 = 49 where A is on the y axis, B is on the X axis and C is the mid point of the straight-line connecting A and B.
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