exam Maths Puzzle Numerical Ability

i need to know how to do line plots and this is the closest that i could get to line plots please help me!

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exam Other Question
Solve each equation for x.
x^2 +4x+4=7
(Hint: Factor the left-hand side.) I HAVE A QUESTION ON SOLVING BY FACTORING((( X^2+6X+8=0 )))