exam Maths Puzzle Numerical Ability

Are the following lines parellel, perpendicular, or neither?

L1 through (-4, -7) and (1, 3)
L2 through (2, 6) and (4, 10)

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exam Other Question

Solve:

1/2*x=(3*x-2)/3

thanks for all your help!!
Find the slope of the line: y + 4= -1/2(x+3)