Chapter 8.1, Problem 11OE

To determine

To write an equation that relates the two variables and includes the value of constant of variation.

Answer to Problem 11OE

The equation can be written as $d=90\times t$ where $90$ is the constant of variation.

Explanation of Solution

Given information:

The given direct variation is:

“The distance $\left(d\right)$ a car travels at $\text{90 km/h}$ is directly proportional to the time $\left(t\right)$ travelled.”

The equation can be written as:

  $\begin{array}{l}d=90\times t\left[\text{Speed}=90\text{ km/h}\right]\\ \text{or},\frac{d}{t}=90\end{array}$

Where the constant of variation is $90$ .