Henry’s utility function is x^2 + 16xw + 64w^2 , where x is his consumption of x and w is his consumption of w. Set the utility function equal to a constant, say k and then try to solve one in terms of the other.

a. Henry’s preferences are nonconvex.
b. Henry’s indifference curves are straight lines.
c. Henry has a bliss point.
d. Henry’s indifference curves are hyperbolas.
e. None of the above.