Graph Correlation

The scatter graph shows the relationship between the amount of rainfall and the number of umbrellas sold each day.

On another day, 30 umbrellas were sold. Estimate the amount of rainfall for that day.

• 5

• 10

• 12

• 8

The scatter graph shows the relationship between the amount of rainfall and the number of umbrellas sold each day.

On another day, there was 8.5 mm of rainfall. Estimate the number of umbrellas sold on that day.

• 75 umbrellas

• 40 umbrellas

• 120 umbrellas

• 30 umbrellas

Using the line of best fit. If a student had a handspan of 20.5 cm, the estimation height will be 160 cm. True or False?

• True

• False

Using the line of best fit. If a student had a height of 146 cm, the estimated handspan will be 17 cm. True or False?

• True

• False

What type of correlation is shown?

The chart shows the cost and length of some plumbing jobs. Estimate the cost of job lasting 3.5 hours.

• £150

• £180

• £210

• £240

Which graph has a negative correlation?

• 
• 
• 
• 

Which graph has a weak and positive correlation?

• 
• 
• 
• 

What is a line of best fit used for?

• To make predictions

• To connect the points

• To make the graph look pretty

• To make it look like you know what you are doing

The scatterplot below suggests which of the following types of data relationship?

• Weak and Negative

• Weak and Positive

• Strong and Negative

• Strong and Positive