### Home > APCALC > 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 constant of proportionality, . If they are not proportional, explain why not. Homework Help ✎

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

*hours at*

**Solution:** ,

Cost

in dollars ofchocolate bars sold forcents 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

formiles driven. 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?