exam Maths Puzzle Numerical Ability

What does it mean when it says "find the quadratic equation where f(1)=2 and the maximum value of f is f(3)=-5"?

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exam Other Question

y=-3x+4 the standard is 5 or fewer defects per 1,000 products shipped. if i have an average ratio of 2.5:1,000 then how much does this figure fall below the minimum standard of 5???