The manager of a nail salon recorded the number of ads she ran in local newspapers and magazines versus the number of customers her salon had in a week, Which is the best interpretation of the y-intercept of the trend line shown?

Question

A. 0 customers with 30 ads
B. 30 additional customers for every as she runs
C. 30 customers when she runs 0 ads.
D, There are 7.5 additional customers for every as run

Given:
Customers= 30,60,50,59,90,65,91,100,100,
Number of ads= 1,2,4,5,6,7,8,9,10,11
Arrow going up starting at 30

Answer 1

In the context of a trend line in a scatter plot where the x-axis represents the number of ads and the y-axis represents the number of customers, the y-intercept represents the number of customers when the number of ads is zero.

The y-intercept is the point at which the trend line crosses the y-axis. This occurs when the value of the independent variable (in this case, the number of ads) is equal to zero.

Given the information, if the trend line starts at 30 for the y-intercept, this indicates that when she runs 0 ads, she has 30 customers.

Therefore, the best interpretation of the y-intercept of the trend line is:

C. 30 customers when she runs 0 ads.