Graph of 2 functions on one grid, origin O. Horizontal axis, time, hours, with 6 grid lines. Vertical axis, medicine, milligrams, with 4 grid lines.  Circles plotted as follows: Vertical axis and third horizontal grid line, first vertical gridline and in between first and second horizontal grid line, second vertical gridline and just below first horizontal gridline, third vertical gridline and halfway between horizontal axis and first horizontal gridline, fourth vertical gridline and one fourth of the way to the first horizontal gridline, fifth vertical gridline and slightly above horizontal axis, sixth vertical gridline and just above horizontal axis. Triangles plotted as follows: Vertical axis and second horizontal gridline, First vertical gridline and about halfway betweent the first and second horizontal gridline, Second vertical gridline and first horizontal gridline, Third vertical gridline and about three fourths of the way to the first horizontal gridline, Fourth vertical gridline and halfway to the first horizontal gridline, Fifth vertical gridline and about one third to the first horizontal gridline, Sixth vertical gridline and about one fourth of the way to the first horizontal gridline.