the foolwing table shows the number of motor registration i a certain territory for a term of 5 years ands ...

the foolwing table shows the number of motor registration i a certain territory for a term of 5 years ands  the sale of motor tyres by a firm in the territory for the same period.

year      motor registration   No. of tyres sold

1             600                          1250

2              630                            1100

3              720                          1300

4              750                           1350

5             800                            1500