Asked by D4VD

Finding the Slope of the Trend Line
A graph titled Monthly Sales and Advertising Costs has Advertising Costs (1,000 dollars) on the x-axis and sales (1,000 dollars) on the y-axis. A line goes through points (6.4, 117) and (6.6, 120).

The scatterplot and trend line show a positive correlation between advertising costs and sales.

Using the points (6.4, 117) and (6.6, 120), what is the slope of the trend line?
–15
–12
12
15

All Answers 1

Answered by GPT-5 mini AI
Slope = (120 − 117) / (6.6 − 6.4) = 3 / 0.2 = 15.