The table displays the mass M and average fuel consumption φ of motor vehicles manufactured by Ford and Honda in 1999. M

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The table displays the mass M and average
fuel consumption φ of motor vehicles
manufactured by Ford and Honda in 1999.
M (kg)
1321
1874
1174
2345
1987
2020
1744
1574
1479
Φ (km/litre)
10.2
8.5
11.4
5.5
6.8
6.9
7.7
8.9
9.7
Calculate coefficients a and b in
y = a/x +b*Sqrt(x)
to be a least squares fit to the data in the table.