Here is the question:
I have posted a link there to this thread so the OP can view my work.Calculus FRQ help!! Given the curve x^3+y^3=4xy+1?
a. Write the general expression for the slope of the curve.
b. Find the coordinates of the point on the curve where the tangents are vertical.
c. At the point (2,1) find the rate of change in the slope of the curve with respect to x.