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) | 22 9 21 17 6 14 17 21 10 Demand 48 29 36 41 20 24 44 34 . . ... a. Calculate the slope and y-intercept for the linear regression equation for these data. y = + (0) x (Round to two decimal places as needed.)