Originally Posted by

**iloveall** During a 12hour period, the tiles in one area of the bay of Fundy cause the water level to rise to 6 m above average sea level and to fall 6 m below average sea level. The depth of the water at low tide is 2 m as measure against a pier.

a)Suppose the water is at average sea level (rest position) at 0:00 hours(midnight) and the tide is coming in. Draw a graph that shows the height of the tide over a 24 hour period. Explain how you obtained the graph.

**What I know:**Assuming the tide rises and falls at a steady rate it is just a jagged graph. It rises for 3 hours, reaches a peak, drops back down to 0 at 6 hours, drops below zero to a minimum at 9 hours, and rises back up to 0 at 12 hours. You repeat that cylce for the second 12 hour period, to get the entire graph for the 24 hours.

I know it will look like this (excuse the dots)

/\../\

..\/..\/

So would the max and min. points be 6 m and -6 m?