exam Maths Puzzle Numerical Ability

What is the linear equation that created this table:
x=-3,-2,-1,0,1, 2, 3
y= 0, 2, 4,6,8,10,12
I am having trouble determining the formula/s to answer these problems.
Thank you

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exam Other Question

Multiply, Using the vertical method. (m^2-5mn +3n^2)(m^2+4mn-2n^2)

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