[单选题]
The relationship between energy, E, * 7 3scznh.sj8:+jbjbm ud2rq n3i/lhand wavel 1rvrg9r ;js+zength, λ, is shown according to the equationsrj1;+ z9g vrr below.
E=$\frac{hc}{λ}$
Which of the below statements are correct for the graph below representing E=$\frac{hc}{λ}$?
I.Energy and wavelength are directly proportional
II.The units for the gradient are J m$^{-1}$
III.The y-intercept has the units J
A. I and III only
B. II and III only
C. III only
D. I, II, and III
