The Mach number of a moving object is the ratio of its speed to the speed of sound (740 mi/h). The following table shows the speed s of a jet aircraft, in terms of Mach numbers, and the time t after it starts to accelerate. Find the regression line that expresses s as a function of t.

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t (min) s (Mach number) 0.00 0.60 1.20 1.80 2.40 3.00 0.88 0.97 1.03 1.11 1.19 1.25