y = -1/2x + 5 should be your equation because it is 5 ft above sea level and its eroding, or going down, 1 ft per 20 years. So every year, the sand dune erodes 1/20 ft more.
Hope this helps!
Answer:
explanation
Step-by-step explanation:
there
are
22
squares
all
together
Solve for x by simplifying both sides of the equation , then isolating the variable
your answer is x=3/4
