Find the equation of the regression line for the given data. Then use this equation to make the indicated estimate. Round decimals in the regression equation to three decimal places. Round estimates to the same accuracy as the given data.

The following table gives the weld diameters d (in mm) and the shear strengths s (in kN/mm) for a sample of spot welds. Find the equation of the regression line, and then estimate the shear strength of a spot weld that has a diameter of 4.5 mm.

Diameter, d (mm) Shear strength, s (kN/mm) 4.2 4.4 4.6 4.8 5.0 5.2 5.4 51 54 69 76 75 85 89