Question

PLEASE HELP!.

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).
A.
y = –5x + 250
B.
y = –25x + 250
C.
–5x + y = 250
D.
–x – 25y = 250

Answer 1

A (tested this and was Correct)

beware there's a similar question but not the same equations

Explanation:

slope of a line = difference in y

or

difference in x (or rise over run) = -25 / 5 slope m = -5

when x = 0 (that is the year 1970), the population is 250.

x = 0 represents the y-intercept.

so the answer choice could have the slope = -5 and y-intercept = 250

which leads to A y = –5x + 250

Answer 2

Im pretty sure that the answer is D.