Let's assume that you like to surf and you monitor heights of ocean waves in Santa Cruz area beaches. This week the steady winds have created some high waves for you to go surfing after taking this test. Your observation says that after about 9 hours of steady wind, the height of wave in the ocean is approximately linearly related to how long the wind has been blowing. During a storm with 50-knot winds, the wave height after 9 hours was found to be 20 feet, and after 24 hours it was 38 feet. a) If t is time after 50-knot wind started to blow and h is the wave height in feet, write a linear equation that expresses height h in terms of time t.