Wave Length (m) Speed (m/s) 100 14.2 125 13.5 130 16.2 175 16.7 210 22 350 24.3 400 24.9 (a) Find the equation of a linear regression line for the data where wave length is the independent variable, x, and speed is the dependent variable. (Enter a mathematical expression. Round your numerical values to two decimal places.) y = (b) Using the equation from part (a), estimate the speed (in meters per second) of a wave that is 200 m long. (Enter a number. Round your answer to one decimal place. m/s