I need to know how to calculate the least squares line through the data points

relative humidity x 46, 30, 34, 52, 38, 44, 40, 45, 34, 60

moisture content y 10, 7, 9, 13, 8, 12, 11, 11, 7 14

I have the variance for the x ,value, it is 82.68

and the variance for the y value is 5.96