exam Maths Puzzle Numerical Ability

Can you please help me graph y < or = to x -5?

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exam Other Question

I have no idea how to solve this problem:

If y is inversely proportional to the square of x, and y=1 when x=4, find y when x=8. Please help me to solve as an equation with three solutions:

m^3+2m^2-3m=0

Thank you