Question

The linear function that models the population of rainbow smelt is y1 = −19.76x + 227, where

x = the years since 1990 and y1 = the number of rainbow smelt.

The linear function that models the population of bloater fish is y2 =
.

The linear equation that determines when the two populations were equal is
.

The solution is x =
years.

Answer 1

The linear function that models the population of bloater fish is y2 =

–92.57x + 1,052

.

The linear equation that determines when the two populations were equal is

–19.76x + 227 = –92.57x + 1052

.

The solution is x =

11.33

years.

Explanation:

Answer 2

The linear function that models the population of bloater fish is y2 =

✔ –92.57x + 1,052

.

The linear equation that determines when the two populations were equal is

✔ –19.76x + 227 = –92.57x + 1052

.

The solution is x =

✔ 11.33

years.

Explanation: