exam Maths Puzzle Numerical Ability

Uisng the equation f(x)=a(x-h)2 + k, how do you determine the direction the graph opens?

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exam Other Question

a cd subscription offers an introductory offer of 12 cd's for 1 cent.cd's purchased there after are $15.98 each. How do I set up the equation for this problem? What is the lowest positive interger that can be divided by 1 to 9?