The inverse variation equation shows the relationship between wavelength in meters, x, and frequency, y
y = 3×10⁸/x

What is the wavelength for radio waves with frequency 3 x 10⁹?
A. 3×10¹⁷m
B. 1×10⁻¹m
C. 3×10⁻¹m
D. 9×1¹⁷