exam Maths Puzzle Numerical Ability

I really need help with parabola, and plotting other points for this problem.
Thanks for your help.

1/5x^2 + 2/5x - 4/5

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exam Other Question

One more than the difference between 18 and 7 times a number is -9 A company makes two types of blenders: the standard model and the deluxe model. each blender passes through three assembly stations; A1, A2, and A3. A standard blender requires 1 h