Tickbox quiz 8 question approach

GRE Quant Problem Solving
1

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Hello,
Can someone give me a detailed approach on how to solve this question correctly?

I saw the explanation in the solution video but it was difficult for me to understand how greg eliminated some of the choices.

Appreciate your help! Not posting my solution since I did not know how to even correctly approach this problem.

2

Find the equation of the line with any two “easy” points then if the region is below that line it’s \leq and if it’s above the line then it’s \geq [WHY?] .

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