Two ocean beaches are being affected by erosion. the table shows the width, in feet, of each beach measured at high tide where 1995 is represented by year 0:

chart:

year number, western beach width (feet) , dunes beach width (feet),

0 100 20

5 90 45

10 80 70

11 78 75

12 76 80

15 70 95

part a:

describe the patterns shown by the erosion data measurements shown for each of the beaches in the table.

part b:

between which years will the beaches have approximately the same width?

part c:

assuming these rates remain constant, what can you do to get a better approximation of when the two beaches will have the same width?