Write the Word or Phrase That Best Completes Each Statement $$r = \frac { d } { t } \text {, where } r \text { is the rate by which distance } d \text { is covered in time } t$$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
Write a sentence that expresses the relationship in the formula, using the language of variation or proportion.
- $$r = \frac { d } { t } \text {, where } r \text { is the rate by which distance } d \text { is covered in time } t$$