Let z = f(x, y), x = x(u, v), y = y(u, v) and x(1, 2) = 4, y(1, 2) = 3, calculate the partial derivative in terms of some of the numbers a, b, c, d, m, n, p, q. fx(1, 2) = a fy(1, 2) = c xu(1, 2) = m yu(1, 2) = p fx(4, 3) = b fy(4, 3) = d xv(1, 2) = n yv(1, 2) = qzu(3,4)=

To summarize, we're given

and we're asked to find the value of (I think there's a typo in your question) given that

By the chain rule, we have

or in subscript notation,

Then

step-by-step explanation:

correct choice is a

step-by-step explanation:

the equation of the line passing through the points and is

thus, the equation of the line that passes through the points (0, -6) and (-3, 0) is