Chapter 3: Worksheet #5 Name:____________

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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

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.

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?