exam Maths Puzzle Numerical Ability

The graph of x-3y=6 is parallel to the graph of which equation?
1) y=-3x+6
2) y=-1/3x+5
3) y=3x-8
4) y=1/3x+8

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exam Other Question

Hi!
The question for this is: for the function f(x)= x^2 -2x+1

a)find f(0)

b) solve f(x)=0

Please and Thank You=) log5 (base of 5) of x + 3 (no parentheses) = log5 (base of 5) of (x-20) + 4