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

Year number Western Beach width (in feet) Dunes Beach width (in feet)
0 100 25
5 90 45
10 80 70
11 78 75
12 76 80
15 70 95
Describe the patterns shown by the erosion data measurements shown for each of the beaches in the table.
Between which years will the beaches have approximately the same width?
Assuming these rates remain constant, what can do you get a better approximation of when the two beachs will have the same width?

Question

Two ocean beaches are being affected by erosion. The table shows the width, in feet, of each beach at high tide measured where 1995 is represented by year 0. 

Year number	Western Beach width (in feet)	Dunes Beach width (in feet)
0	100	25
5	90	45
10	80	70
11	78	75
12	76	80
15	70	95
Describe the patterns shown by the erosion data measurements shown for each of the beaches in the table.
Between which years will the beaches have approximately the same width?
Assuming these rates remain constant, what can do you get a better approximation of when the two beachs will have the same width?

anonymous · Answer

Western Beach is losing sand, Dunes beach is gaining sand. 

Between 11 and 12 years 

Plot the data against time and draw a curve that goes through the data. Where the two lines cross is the time when both beaches are the same width.