exam Maths Puzzle Numerical Ability

Graph the following line: y=((5x)/3)-3
I need at least three points so if someone can explain everything about this I would really appreciate it. Thanks

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exam Other Question

Directions say: solve each system of equations.
2x-y+z=1
x+2y-4z=3
4x+3y-7z=.8 Find all real or imaginary solutions to this equation:

x^-2-9x^-1+18=0

I am no sure really where to start whether I should square the entire problem or what I am stumped. Please help!!