exam Maths Puzzle Numerical Ability

What is the function which would intersect the y-axis 2 positions up (vertical) from the function f(x)=x^2?

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exam Other Question

An experienced accountant can balance the books twice as fast as a new accountant. Working together it takes the accountants 6 hours. How long would it take the experienced accountant working alone? sqrt(x + 4) + sqrt(x - 1) = 5