Temperature (x) 65 70 75 80 85 90 95 100 105

Number of ice cream cones sold per hour (y) 8 10 11 13 12 16 19 22 23

Calculate the linear correlation coefficient r, for temperature (x) and number of ice cream cones sold per hour (y). (round to 3 decimal places)

Is there a linear relation between the two variables x, and y? If yes, indicate if the relationship is positive or negative. (Hint : use the Critical Value table)

Construct the least squares regression line for temperature (x) and number of ice cream cones sold per hour (y). (round to 3 decimal places)

Predict the number of ice cream cones sold per hour when the temperature is 88. (round to nearest whole number)

Would it be reasonable to use the least squares regression line to predict the number of ice cream cones sold when it is 50 degrees?