Can we draw a trend line? If so, which direction does it point as we move from left to right on the graph?
Type of Correlation: Positive Scatter Plot:
Practice makes perfect
When analyzing data using a scatter plot, there are three general outcomes for the correlation of the data: positive correlation, negative correlation, or no correlation.
Observation
Type of Correlation
As x increases, y increases.
Positive
As x increases, y decreases.
Negative
There is no visible pattern.
No
By treating the table as a set of points, we can graph the given data as a scatter plot. Do you see any trends?
It looks like there is some kind of correlation. Let's draw a trend line, to help us identify the type of correlation. To do so, we will draw a line that appears to fit the data closely.
As dollar spent increases, gallons bought increases. This indicates a positive correlation between gallons bought and dollar spent.
