Brian works for a manufacturer of sports equipment and is currently developing a company sales forecast for golf clubs. While reviewing data, he discovered a pattern in sales volume over the past ten years that peaked during two months of each year. Brian likely used which sales forecasting technique? a. the Delphi technique
b. Executive judgment
c. Time series analysis
d. Market tests
e. Regression analysis

C. Time series analysis.

Explanation:

Time series analysis is explained to be a statistical technique that its basic dealings is found within time series data, or trend analysis. It ensures that data is in a particular series and at particular time periods or intervals. It is considerably seen in three different kinds which are a) time series data, b) pooled data and lastly c). cross sectional data.

They seen to be of different advantages which includes:

i). It is seen to be used to understand the past as well as predict the future. ii). Also in a usual time series, it is seen to have plot trend and also seasonal components.

if you are on the computer you can not take a picture but you can upload one but i am not sure about phones but i'm pretty sure it's the but to upload one just click the paper clip looking thing/ link thingy thing and upload a pic

the first question's answer is a.