Pls!i really need help

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

When a septic tank backs up a goes in to clean it out

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.