Slope (a)

b

R²

Coal

0.3

−605.2

0.9868

Oil

0.2

−399.6

0.8929

Gas

0.54

−1090.4

0.9746

Hydro

1.34

−2700.8

0.965

Bio-energy

0.08

−161.4

0.8

Solar PV

0.38

−768.4

0.9025

Other Renewable

0.44

−887.8

0.9098