Consider a Production Function $Q = 3 K + 4 L$

Multiple Choice

Consider a production function $Q = 3 K + 4 L$ , when $L$ is graphed on the $x$ -axis and $K$ is graphed on the $y$ -axis, the marginal rate of technical substitution is equal to:

A) $4 / 3$ and the isoquant is convex to the origin.
B) $4 / 3$ and the isoquant is a straight line.
C) $3 / 4$ and the isoquant is a straight line.
D) 12 and the isoquant is convex to the origin.