Question 1006089
The vector from P to Q is ({{{18-3}}},{{{9-1}}})=({{{15}}},{{{8}}}).
To unitize it, divide by its magnitude.
{{{abs(PQ)=sqrt(15^2+8^2)=sqrt(225+64)=sqrt(289)=17}}}
({{{15/17}}},{{{8/17}}})
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Multiply the unit vector by {{{34}}}.
{{{34}}}({{{15/17}}},{{{8/17}}})=({{{(34/17)15}}},{{{(34/17)8}}})=({{{30}}},{{{16}}})