Question 1110566
For magnitude, use the distance formula,
{{{D^2=(x[1]-x[2])^2+(y[1]-y[2])^2}}}
{{{D^2=(3-1)^2+(-7-(-4))^2}}}
Solve for {{{D}}}.
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For the direction, use the slope,
{{{tan(theta)=(y[2]-y[1])/(x[2]-x[1])}}}
{{{tan(theta)=(3-1)/(-7-(-3))}}}
Solve for {{{theta}}}.