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**IDontunderstand** Find a vector determined by the two points in ai+bj form and then find its magnitude.

(-3,1) and (4,-2)

(4,7) and (0,5)

I have no idea where to start. All I know is that a=<1,0> and b=<0,1>

I think that I want to find the ordered pair/component form of the vector

1) which will be <7,-3>.

Do I find the magnitude of that vector? (Squrt(58))

I do not know what to do know. I get stuck here if the first part is correct and I am not sure if that is correct.

Thank you