Write down the eqn. of the line that passes through the points $(4, -2, 1)$ and $(6, 0, 3)$ in all three forms.

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I'm stuck because I can't find the parallel vector. Do you know how to find it? I'd just assumed that vector r0 = <4, -2, 1>.

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It's $$(6-4,0-(-2),3-1)=(2,2,2)=2(1,1,1).$$ Can you end it now?