Consider the following production function: q=9LK+6L² - (1/3)L³
Given the following expressions for the marginal productivity of each input: MP(L) = 9K + 12: - L² and MP(K) = 9L
​Assuming capital is plotted on the vertical axis and labor is plotted on the horizointal axis, determine the value of the marginal rate of technical substitution when K=25 and L=10. (Round your answer up to two decimal places and include the proper sign.) MRTS = ____.