The Figure Below Shows the Graph of Z = F(x $f _ { y } ( 0,1 )$

question 92

Multiple Choice

The figure below shows the graph of z = f(x, y) and its intersection with various planes.(The x and y-axes have the same scale.) What is the sign of $f _ { y } ( 0,1 )$ ?

• A)Negative
• B)Positive