An article discusses the calibration of a radiometer. Several measurements were made on the electromotive force readings of the radiometer (in volts) and the radiation flux (in kilowatts per square meter). The results (read from a graph) are presented in the following table.

Heat flux (y)	16	31	51	55	67	89
Signal output (x)	1.08	2.42	4.17	4.46	5.17	6.92

Compute the least-squares line for predicting heat flux from the signal output. Round the answers to three decimal places. y = ? + ?x