Suppose Good X Is on the Horizontal Axis, Good Y

Multiple Choice

Suppose good X is on the horizontal axis, good Y is on the vertical axis, and the slope of an individual's budget line is -2. Which of the following is true?​

A) ​Good Y is twice as expensive as good X.
B) ​The consumer gives up two units of good Y for each unit of good X she purchases.
C) ​The opportunity cost of good X is one half of a unit of good Y.
D) ​All of the above are correct.