Question

Please help!! ill give brainliest!!! this is worth 30 points!!!!!!!!​

Answer 1

Answer:   a. 45 = k

                 b. d/t = 45

                 c. d = 45t

Step-by-step explanation:

The constant of proportionality (k) equals y divided by x if it is a direct variation.  In the given problem, y is represented by distance (d) and x is represented by time (t).

$a)\quad \dfrac{d}{t}=k\\\\\\.\qquad \dfrac{90}{2}=k\\\\\\.\qquad 45=k\\\\\\b)\quad \dfrac{d}{t}=k\\\\\\.\ \quad \dfrac{d}{t}=45\\\\\\c)\quad \text{multiply both sides by t:}\\.\qquad d=45t$