Unit seven lesson six trend lines practice
1. The following table represents the number of subscribers to a magazine over a 5-year period:
| Year | Subscribers |
|------|-------------|
| 1 | 1000 |
| 2 | 1200 |
| 3 | 1400 |
| 4 | 1600 |
| 5 | 1800 |
a) Find the trend line for the data using linear regression.
b) Predict the number of subscribers in year 6.
2. The following table represents the sales revenue of a company over a 8-month period:
| Month | Revenue (in thousands) |
|-------|------------------------|
| 1 | 100 |
| 2 | 120 |
| 3 | 130 |
| 4 | 140 |
| 5 | 150 |
| 6 | 160 |
| 7 | 170 |
| 8 | 180 |
a) Find the trend line for the data using linear regression.
b) Predict the sales revenue for month 9.
3. The following table represents the average temperature in a city over a 12-month period:
| Month | Temperature (in degrees) |
|-------|---------------------------|
| Jan | 10 |
| Feb | 12 |
| Mar | 15 |
| Apr | 20 |
| May | 25 |
| Jun | 30 |
| Jul | 35 |
| Aug | 32 |
| Sep | 28 |
| Oct | 22 |
| Nov | 18 |
| Dec | 14 |
a) Find the trend line for the data using linear regression.
b) Predict the average temperature for July.