Question

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?

Answer 1

m = (120 - 117)/(6.6 - 6.4) = 3/.2 = 15

Answer 2

The slope of the trend line is 15.

Step-by-step explanation:

The slope of the trend line can be calculated using the formula:

slope = (y2 - y1)/(x2 - x1)

Using the points (6.4, 117) and (6.6, 120), we can substitute the values into the formula:

slope = (120 - 117)/(6.6 - 6.4)

slope = 3/0.2

slope = 15

Therefore, the slope of the trend line is 15.