SOLUTION: Use parametric differentiation to find dy/dx in terms of t, then evaluate dy/dx when t = −1: x = at + b y = bt + a

Question 1180105: Use parametric differentiation to find dy/dx in terms of t, then evaluate dy/dx
when t = −1:
x = at + b
y = bt + a
Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.


 = a.


 = b.


          THEREFORE


 =  = .    ANSWER



Notice that the answer does not depend on the value of "t".

It is the same for any value of "t"; in particular, for t = -1.

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Solved, answered and explained. And completed.

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