2 pts
The graph of z² + y² + xy = 7 is shown here.
The following two questions can be answered by viewing the graph, and
you can check your answers by finding the derivative value discussed in the
previous problems.
1. What is the sign of the slope of the tangent line to the graph at (1, 2)?
[Select] (negative, positive, zero, not enough info)
2. Which of the following is the best estimate for the slope of the tangent
line to the graph at (1, 2)? [Select] (1, 0, 0.01, -0.01, -1)