Interpretation of graphs

Look at the bar graph on the left. What does the bar graph measure?

• Kilowatts used by appliances

• Hours appliance used per day

• Total electricity per year

• Hours appliance used monthly

What do the numbers on the vertical axis of this graph represent?

• Hours in a day

• Days of the week

  
  

• Types of appliances

• Amount of electricity used

  
  

Now read what’s on the horizontal axis, the line that runs along the bottom of the graph from left to right. It is labeled Appliance. Each appliance in the graph has two bars. What is measured by the blue bar?

• Amount of electricity used

• Weekday: hours of use

• Number of appliances used

• Weekend: hours of use

Which appliance has the most total usage?

• Fridge

• Heater

• Lights

• Television

On average, how many hours is the computer used on a weekday?

• 8

• 16

• 2

• 10

How many hours a day on average is the heater used on weekends?

• 5

• 8

• 13

• 14

Which appliances are used for an average of 5 hours a day more on weekends than on weekdays?

• Lights and Television

  
  

• Television and Other

• Lights and Heater

  
  

• Heater and Computer

After the refrigerator, which appliance is used the most on weekdays?

• Television

• Heater

• Lights

• Computer

Which appliance is used twice as many hours on the weekends as it is on weekdays?

• Lights

• Computer

• Refrigerator

• Television

Which appliance is used for more hours on weekdays than on weekends?

• Lights

• Computer

• Refrigerator

• None of the above