Math Scatter

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55

• 0

• 103

• 100

As x increases, y increases

• correlation coefficient

• causation

• positive correlation

• negative correlation

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A

• B

• C

• D

If a scatterplot has no correlation then...

• ...it has no ordered pairs

• ...it has ordered pairs that have a negative pattern

• ...its ordered pairs have no predictable pattern

• ...if it makes a lion on a graph (roar!)

What is a scatter plot?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

What type of association (correlation) does this graph have?

• positive 

• negative

• none

• all of the above

What is the type of association (correlation)?

• Negative 

• no association

• positive 

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

Estimate the y-intercept of the trend line by looking at the graph.

• 2

• 1.8

• 1.2

• 0