Perfectly competitive firms are price takers

The _____ interest rate tells you how fast the number of dollars in your bank account will rise over time, and it is the sum of the _____ interest rate and the _____

Fill in the blank(s) with correct word

Variables X and Y are independent of each other. If we plot X on the horizontal axis and Y on the vertical axis, the line that connects combinations of X and Y in a two-variable diagram is

A) parallel to the horizontal axis. B) downward-sloping (left to right). C) parallel to the vertical axis. D) upward-sloping (left to right). E) a or c