exam Maths Puzzle Numerical Ability

Hi..I am studying solving and graphing equations. I do not understand the table of values. Like a = 2.4 b - 1.6...could you please help me?
Thank you
Jan

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exam Other Question

Translate the following statement into an algebraic equation. Let x represent the number.
1 more than a number is 7
Perform the indicated divisons:
7x^5y5-21x^4^4+14x^3y^3/7x^3y^3