Scatter Plots and Linear Models

Jared collected data on the ages and heights of a random sample of elementary school students. If he plots the data on a scatter plot, what relationship will he most likely see between age and height?

• A negative correlation

• No correlation

• A positive correlation

• A constant correlation

The graph shows the weights of dogs and the time it took the same dogs to complete an agility course in seconds.

Which shows the line of best fit for the data?

• 
• 
• 
• 

Which graph represents a positive correlation?

• 
• 
• 
• 

Mr. Van made a graph to represent the time his students spent studying for their test and their actual test score. Which is the correct equation for the line of best fit?

• y = 1.4x + 55

• y = 1.4x – 84

• y = 0.72x + 60

• y = 0.72 + 56

Which relationship is shown by this scatter plot?

• As the cost goes down, the number sold goes

  down.

• As the cost goes up, the number sold goes

  down.

• As the cost does down, the number sold

  remains the same.

• There is no relationship between cost and the

  number sold.

The scatter plot shows the weight of a bag of pretzels based on how many pretzels are in the bag. Consider the trend line. Which of these statements are TRUE?

• the trend line indicates a negative association

• the trend line indicates a positive association

• If a bag contains 40 pretzels, the weight will be about 2.5 ounces

• the trend line is a "good fit" for this scatter plot

• there is no association between the number of pretzels and the weight of the bag

The scatter plot represents the amount of dog food recommended based on the weight of the dog. Which BEST describes the type of association shown in this scatter plot?

• no association

• nonlinear association

• positive association

• negative association

Consider the scatter plot graphs. Look at each trend line. Which graph does a better job capturing the trend of the data?

• Graph A

• Graph B

• Neither Graph

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 type of correlation does this scatter plot show?

• positive

• negative

• no correlation

• nonlinear association