Posted by Sarah on Friday, June 15, 2012 at 12:18am.
they're parallel
it says determine the value of k so that u and v ARE perpendicular .... if it was parallel, i don't think it would ask me to find k....... unless it's a trick question ...
slope of u = -7/3
so slope of perpendicular to u = +3/7
so
3/7 = k/16
7 k = 48
k = 48/7
or...
their dot product must be zero
(-3)(16) + 7k = 0
7k = 48
k = 48/7
thank you everyone
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