The following table shows the hot dogs bought from a street vendor over the course of eight days ("Demand"). Also shown is the temperature for each day in degrees Celsius. Complete parts a and b below. Temperature ("C)|19 12 22 18 5 14 20 21 Demand 49 32 35 38 20 25 42 35 a. Calculate the slope and y-intercept for the linear regression equation for these data. y = + () x (Round to two decimal places as needed.) b. Predict the demand for hot dogs on a day with a temperature of 9"C The predicted demand for hot dogs on a day with a temperature of 9"C is] (Round to the nearest integer as needed.)