Question

A small rural town has experienced a population decrease at a rate of 25 people every 5 years since 1970. If the population of the town in 1970 was 250, which of the following equations represents the town’s population as a function of time? (Assume 1970 is represented by x = 0, 1971 is represented by x = 1, and so on).

Answer 1

using the info, here is a table we can make:
1970 250
1971 250-25/5 = 245
1972 245-25/5 = 240

using 1970 as x=0, our table becomes like this:
0, 250
1, 245
2, 240

which of the choices given to you goes with the table we made?