1. Chapter 3: Worksheet #5 Name:____________
1. Which graphs represent a direct variation relationship? How do you know?
2. Sam earns $8/h babysitting.
Create a table of values to show his total earnings for 0 h to 5 h of babysitting.
b) What is the rate of change? x 1 2 3 4 5 y

2. c) Graph the relationship between Sam’s total earnings and the number of hours of babysitting.
d) Is it reasonable to draw a solid line from the origin to connect
the points? Explain your thinking.
e) What are the slope and y-intercept of the graph?
f) Use the graph to estimate how many hours Sam has to babysit
to earn $20.

3. Each minute of a song in MP3 format takes up about 1
Each minute of a song in MP3 format takes up about 1.4 MB of storage space.
a) Create a table of values to show the amount of storage space needed for each minute of music, for 0 min to 10 min. Graph the results from part a) in a scatter plot.
b) Connect the points with a solid or dashed line, and explain your choice.
c) What are the slope and y-intercept of the graph?