exam Maths Puzzle Numerical Ability

What graph would match the function:
f(x)= x^3+2x^2-3x-2

Thank you for your help.

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exam Other Question

Find each value if f(x)=7x+2 and g(x)=4x-x/2.

1. f(-7) 2. g(8) 3. f(8/14) 4. g(-6n)

Please help me find the answers. I dont understand. The square of a number is the second power of the number. The cube of a number is the third power of the number. Explain why these names are reasonable.