Final answer:
To find the exact amount of sales given the advertising cost, we can use the equation of the trend line to calculate the corresponding sales amount.
Step-by-step explanation:
In order to find the exact amount of sales given the advertising cost, we can use the equation of the trend line. The equation of a trend line represents the relationship between two variables, in this case, sales and advertising cost. By plugging in the value of the advertising cost into the equation, we can calculate the corresponding sales amount.
For example, let's say the equation of the trend line is: sales = 0.5 * advertising cost + 1000. If the advertising cost is $2000, we can substitute this value into the equation:
sales = 0.5 * 2000 + 1000 = 2000 + 1000 = 3000
Therefore, the exact amount of sales given an advertising cost of $2000 is $3000.