Step 1:
The constant of proportionality is the ratio that relates two given values in what is known as a proportional relationship. Other names for the constant of proportionality include the constant ratio, constant rate, unit rate, constant of variation, or even the rate of change.
Step 2:
The constant of proportionality is the speed.
Speed = Distance / Time
Step 3:
[tex]\text{Speed = }\frac{Dis\tan ce}{\text{time}}\text{ = }\frac{60}{1}\text{ = }\frac{120}{2}\text{ = }\frac{180}{3}\text{ = }\frac{240}{4}\text{ = }\frac{300}{5}\text{ = 60 mi/h}[/tex]
Final answer
The constant of proportionality = 60
