exam Maths Puzzle Numerical Ability

Graph the following equation.

y=3x+1

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exam Other Question

how would you work this out 4xcubed-13xsquared+11x-2=0
also I got this problem to do it's 2xsquared+3x+1=0 I got this answer x=1/2 and x=-1 is this right solve for a: p=a+b+c