A truck is traveling at a constant speed. Find the speed of the truck. Write a formula that connects d and t. What is the coefficient variation of k?
a. Speed = ( d/t ), Coefficient variation of k is not applicable
b. Speed = ( t/d ), Coefficient variation of k is not applicable
c. Speed = ( d × t ), Coefficient variation of k is not applicable
d. Speed = ( d/t ), Coefficient variation of k depends on the specific context