The slope of the trend line is 15. What does that mean in regard to the data of the scatterplot? Check all that apply. The slope represents the rate of change of the data. Advertising costs increase $15,000 as sales increase by $1,000. Sales increase $15,000 as ads increase by $1,000. A positive slope infers a negative correlation. A positive slope infers a positive correlation.'
Without the graph, we can't be 100% certain. However, it makes sense that the sales increase by $15,000 as the ads increase by $1000. It is always the change in the vertical axis over the change in the horizontal axis.
A positive slope is always a positive correlation.
