book Maths Puzzle Numerical Ability

Graph equation; Let X=-3, -2, -1, 0, 1, 2,and 3.
20) y=-1/2x + 2

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book Other Question

I need help on the quadratic equation: 2x(to the 2square)-7x+5=0? How do you solve it? how would you give statements and reasons to prove this proof?
given:AB is =^~ to BC; BD bisects triangle ABC
prove: triangle ABD =^~ triangle CBD