exam Maths Puzzle Numerical Ability

could you help me: determine the correct half-plane and complete a graph for y>3

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exam Other Question

Perform the indicated operations

14x-7/x^2+3x-4 times x^2+6x+8/2x^2+5x-3 divided by x^2+2x/x^2+2x-3
Let f(x)=1-2x and find

a) f^-1 (x) and b) 1/f(x)