What is your favorite TV program? *There is no wrong or right answer, just need it for a project*

Hye-seung is giving a speech on turtles, specifically on the need to protect the turtle population in the pacific ocean due to rising ocean temperatures. the general purpose of her speech is likely:

The lifeguard at the local beach record the tides each day the chart below shows the high and low tides over two days

Which situation is most likely to show a constant rate of change?