Scatter Plots and Linear Associations

Scatter plot are graphs that use points to display​ (a)   data.

• numerical
• bivariate
• association
• categorical

What does bivariate mean?

• 1 variable

• 2 variables

• 3 variables

• 4 variables

Scatter plots can help determine if one variable has an effect on the other, or if there are overall trends, patterns, or ​ (a)   between the variables.

• associations
• bivariate
• numerical

Hector surveyed 500 people and asked them how far they drive to work and what the last digit of their phone number is. He used the results to make a scatter plot.

What type of association should he expect to see in the scatter plot?

• Positive Association

• Negative Association

• No Association

What does it mean when two variables have no association?

• When the variables move in opposites directions, one increases and the other decreases.

• When the first variables has no effect on the second variable

• When the variables move in the same direction. They both increase.

Jules conducted a survey and asked 100 people how many years of education they have and what their annual income is. She used the results to make a scatter plot.

What type of association should she expect to see in the scatter plot?

• Positive Association

• Negative Association

• No Association

What does it mean when two variables have a positive association?

• When the variables move in opposites directions, one increases and the other decreases.

• When the first variables has no effect on the second variable

• When the variables move in the same direction. They both increase.

Label the type of association:

• Positive

• None

• Negative

Label they type of association:

• Positive

• Negative

• None

Label they type of association:

• Positive

• Negative

• None