What happens to a signal's wavelength as its frequency increases?

Radio waves always travel at a constant speed, which is the speed of light. Because of this constant speed, a signal's frequency (how many cycles occur per second) and its wavelength (the physical length of one cycle) are inversely proportional. If you increase the frequency, more cycles are squeezed into the same amount of time. To fit more cycles into that same time frame while traveling at the same speed, each individual cycle must physically become shorter. Therefore, the wavelength decreases. The options suggesting a 'squared' relationship are mathematically incorrect; the relationship is a simple linear inverse fraction (Wavelength = Speed of Light / Frequency).