In econ module, reading 14, question 4
"4. If a consumer’s marginal rate of substitution of good X for good Y (MRSXY) is equal to 2, then the:
A. consumer is willing to give up 2 units of X for 1 unit of Y. B. slope of a line tangent to the indifference curve at that point is 2. C. slope of a line tangent to the indifference curve at that point is –2."
Why is A not the correct answer?
"4. If a consumer’s marginal rate of substitution of good X for good Y (MRSXY) is equal to 2, then the:
A. consumer is willing to give up 2 units of X for 1 unit of Y. B. slope of a line tangent to the indifference curve at that point is 2. C. slope of a line tangent to the indifference curve at that point is –2."
Why is A not the correct answer?