5-35 Trevor Harty, an avid mountain biker, always wanted to start a business selling top-of-the-line mountain bikes and other outdoor supplies. A little over 6 years ago, he and a silent partner opened a store called Hale and Harty Trail Bikes and Supplies.

Growth was rapid in the first 2 years, but since that time, growth in sales has slowed a bit, as expected.

The quarterly sales (in $1,000s) for the past 4 years are shown in the table below:

Year 1 Year 2 Year 3 Year 4 Quarter 1 274 282 282 296 Quarter 2 172 178 182 210 Quarter 3 130 136 134 158 Quarter 4 162 168 170 182

(a) Develop a trend line using the data in the table.

Use this to forecast sales for each quarter of year