Both a and b

(3 points) The times for high and low tides are given in the table for a recent day in Jacksonville Beach, Florida. The times are rounded to the nearest hour and the tide levels are measured relative to mean sea level (MSL). Time (hrs. after midnight) Height Relative to MSL (ft) to 12 hours after midnight. b. Use a secant line to estimate the height of the tide relative to MSL at 8 am