### Home > CALC > Chapter 6 > Lesson 6.1.1 > Problem 6-11

PROPORTIONAL RELATIONSHIPS

In parts (a) through (d) below, decide whether the two given quantities are proportional. If they are, write an equation relating them and state the proportionality constant *. *If they are not, explain why not.

**Example:** Distance * *traveled (in miles) when driving for

*hours at a constant speed of*

**Solution:**

*, with*

*.*

Cost

in dollars ofchocolate bars atcents each. andare proportional

Number of hours

that it takes to drivemiles at miles per hour.distance

(rate)(time)

Is rate proportional to time?

Taxi fare

depends on the number of milesdriven. The fare isfor the first mile, then for each subsequent mile. Write an equation for the total taxi fare.

Is this a proportional relationship?

Time

it takes to readmysteries if each book takeshours to read.

Is this a proportional relationship?