book Maths Puzzle Numerical Ability

Can you please help me with these two problems. Graph each equation: y=-3x+2. I am having a hard time understanding the x,y charts. Any tips?
And 3x+4y-8=0
Thank You

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book Other Question

3x-11y+5x+2y the equation x(squared)-x=0 has two solutions. whats the other?