The depth of the water in meters at a certain pier is given by the equation: (Use a graphing paper)
() = +

(

)
where is the number of hours after 10 a. m
i. Draw the graph of the depth of the water versus time.
ii. Determine the depth of the water at 12 am
iii. There is a rock shelf near the pier that is only safe to visit when the depth of the water is 1.75 or
less. If Dakota wants to visit the rock shelf in the evening, between what times should she go?