A graph plots price versus quantity. 2 rising lines and 2 falling lines are graphed.The horizontal axis is labeled quantity. Points Q 1, Q 2, Q 3, and Q 4 are marked on the horizontal axis from left to right. The vertical axis is labeled price. Points D, C, B, and A are marked on the vertical axis from bottom to top. 2 rising lines and 2 falling lines are graphed. A rising line labeled 5 begins at (0, B), passes through (Q 2, A), and ends on the top-right. A point marked on the rising line labeled 5 corresponds to Q 3 on the horizontal axis. Another rising line labeled 6 begins at (0, D), passes through (Q 2, C) and (Q 4, B), and ends at a point that is below the ending point of the line labeled 5. 2 rising lines are parallel. A falling line labeled 7 begins at (0, B), passes through (Q 2, C) and (Q 4, D), and ends at a point that is below the ending point of the line labeled 6. Another falling line labeled 8 begins at (0, D) and ends at a point that is below the ending point