exam Maths Puzzle Numerical Ability

Graph on a rectangular coordinate system:
y > x + 2

(PS: Please show how you worked it out. I have been having mojor problems with these kinds of questions. Thanks.)

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exam Other Question

The Cost in thousands to produce Super Lemonade is C(x)=x^2+10 where x is the number of units produced in thousands. The price that Super Lemonade can be sold for is p(x)=-x+16. De Patty Wack had $900. She invested part of it at 12% and the rest at 9%. If her total annual return was $96, how much did she invest at each rate?
-----at 12% -----at 9%