Answer:

see the explanation
Step-by-step explanation:
Let
x ----> the number of years since 2008,
g(x) ----> the percent of people 25 years and older who have completed at least high school
we know that

so
For x=15 years since 2008
substitute

That means
In the year 2023 (2008+15) the percent of people 25 and older completing at least high school will be 93.8%
Answer:
(2, 2) states x=2 and y=2
Considering the inequality:

Is y less than or equal to 2 when x = 2?

Yes, (2, 2) is a solution for the inequality.
The temperature would be (21.5 + 6.25) which is 27.75
Your question evokes several thoughts. Here are two of them:. 1). It takes 3 points not all on the same line to define a plane. 2). Two points ALWAYS lie on the same line.