A Researcher Studied the Relationship Between the Wavelength and the Frequency

A researcher studied the relationship between the wavelength and the frequency of light.
Experiment 1: If the wavelength of light was 0.50 meter, the frequency was 6 × 10⁸ hertz.
Experiment 2: If the wavelength of light was 1.0 meter, the frequency was 3 × 10⁸ hertz.
From this data one can generalize that as the wavelength of light decreases

A) the frequency decreases by a proportional amount.
B) the frequency increases exponentially.
C) the frequency decreases exponentially.
D) the frequency increases by a proportional amount.