Which of the following can be modeled with a linear function? Select all that apply. a. The cost per visit to a community pool. The neighborhood charges a yearly fee to use the pool.

b. The cost to attend a show at the local theatre. Tickets are $12 each.

c. An endangered species population is decreasing by 15% each year.

d. The distance a bicyclist travels when cycling at a constant speed of 30 mph.

e. The population of a town growing at a constant rate each year.

PLEASE HELP!

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

correct answer is c. just did it

step-by-step explanation:

(x) - (y) = (1 + 4i)