exam Maths Puzzle Numerical Ability

Graph: f(x) = 2x + 2.

Thanks for any help you can provide.

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exam Other Question

What would be the correct way to do this proof?
I tried it many times and i don't know how to say what i want to say, i understand the concepts just not the way to word it.- Tha a triangle has an area a=1/2bh. if the area o a triangle is 6sq. cm , find the solution set of all possible whole number values for b & h.