Yes, given the equation of a trend line, you can find the estimated amount of sales corresponding to a specific advertising cost. The equation of a trend line represents the relationship between the advertising cost (independent variable) and the sales (dependent variable). By plugging in a specific value for the advertising cost into the equation, you can calculate the estimated amount of sales associated with that cost. This allows you to draw conclusions about the expected sales given a certain advertising investment. However, it is important to note that the trend line is based on statistical analysis and provides an estimate, so the actual sales may vary.
